Edited Recording Cisco CCNA Grab Bag | Cisco CCNA 200-301

[Music] here is question number one multiple select where can name to ip mappings be found all right every single answer on the board here is absolutely true bob's my favorite fictitious user and then he's going out he's got a network he's connected to and then there's probably a firewall and then there's the rest of the internet and maybe he has an internal dns server or perhaps he's got a dns server he's using like google at 888 or something so bob makes a request to the dns server and then that dns server if it's cached it can respond back so a local dns server cache could answer back and tell bob what the ip address is for cisco.com without having to go any further because it's cached locally so a lot of you got that great fantastic the local client cache when bob finds out what cisco.com is bob's computer is going to also catch that for a period of time so that can be cached there the non-authoritative dns servers let's imagine that we have our top our root dns servers and we have our top level domains then we have our authoritative servers there might be another layer in there but when a request goes out it might have to go to the root and the top level domain and then authoritative server for that domain like cisco.com and that would be an authoritative server that knows hey cisco's ip address is this or it could be another dns server in the path that had that information also cached which could have responded as well so if we take a look at something like this where i did that ns look up which is a great tool to do name resolution and i said nslookup cisco.com i accidentally put a slash there at the end that doesn't need to be there and it showed me who resolved this for me i'm using cisco's umbrella who the dns server is and then the non-authoritative answer came back telling me that cisco.com is at this quad a record for ipv6 and this a record for ipv4 and it's not not authoritative because it didn't come back from the dns servers literally at cisco it was cached somewhere in the path and that's why it's specified to be a non-authoritative answer that's coming back which options plural restrict inbound telnet access on the vty lines when people connect in with ssh or telnet they're logically connecting on the vty lines now by default those vty lines on many routers are zero through four five different v2 eye lines but a lot of devices have more like a multi-layer switch will normally have by default 0 through 15 which is 16 and you can also create more so these are just logical placeholders when people connect to the router via telnet or ssh so if we went to the vty lines like line vty 0 space 15 we said no login it sounds it sounds bad but but what it really means is there's no login required that's what no login does no login says no login required at all so if we're using telnet for example somebody telnet and we just let them in like okay you're in in fact let's do this real quick as a fun little exercise let me clear that off let me bring up this window all right so this is a core one just it's a multi-layer switch we do a show run section line that's just going to show us the running config regarding line configuration so i've got 0 through 15 is the defaults so transport input all right here just basically says ah yeah telnet ssh it's all good bring it on which which is not good we know you and i that in a production environment we don't want to use telnet because it's plain text i mean eavesdropping on that's going to sniff out our passwords and any configs that we send back and forth um but for this demonstration let me go ahead and do no login so config t line vty 0 through 15 that's our 16 v2 lines and we'll say no login all right let me just make sure i have an ip address we can connect to another great thing to do is after i make a change on a device i just want to verify that change took so i'm just gonna do a show run pipe section line again and sure enough i got no login on 0 through 4 and also 5 through 15. don't shoot the messenger that's just how they carve it up uh when they put the output all right so let's go let's take a look at our ip addresses show ip interface brief there we go oh my gosh so many interfaces let's do this uh we do show ip interface brief pipe exclude unassigned anything that has a word u n in it one lot show up that'll save us a little bit of output okay so i've got 10 10 0 1 let's go to another switch another multiplayer switch and let's tell that from here all right and we'll do telnet to 10.10.0.1 was that the address nope nope keith it wasn't let's see here core oh i'm on switch one switch one is an access layer switch it has no ip address that's why it can't do anything so i need to go i need to go to core two which does have an ip address let's do a ping 10.10.0.1 all right he shoots his score so we know that we have connectivity at layer three let's do it telnet to 10.10.0.1 is trying look at that so we are telling that it in and we can verify that by doing a who this uh that's effectively the command of show users and it's going to show so i'm going to press enter here and that's going to show us who's connected so i'm logically connect on vty line 0 and i'm coming in from the source ip address of 10202 so no login not good because it's going to allow people to connect without having to log in here is question number three multiple select good luck everybody which of the following use or are connectionless protocols look at that look at that right there okay well let's talk about these for a moment tftp uses udp at layer four and it is the well-known port of 69 and the ports don't really matter too much but udp is connectionless there's no sequencing there's no acknowledgements it's just boom there you go at the application layer we have some checking and stuff but it is connectionless it's using layer 4 udp dhcp is also leveraging at layer 4 it's using udp a dns request is using udp and that is port 53 udp is connectionless once again but the one that most people didn't answer correctly was ip ip is absolutely connectionless as well at layer 3. let's talk about this for a moment at layer 3 i p in the header it doesn't it doesn't give a hoot it doesn't care it's just like i'm setting a packet i'm sending a packet and routers are routing that stuff and at layer 3 in the ip header there's no acknowledgements there's no sequencing it's it's absolutely connectionless at layer three now that may be a concept that we haven't talked about i mean that maybe you haven't been introduced to before but it is absolutely true at layer 3 by itself it is connectionless all we're doing is shipping packets around the network and hoping that they get there there's no acknowledgements for an ip packet at layer three now layer four if we use something like tcp we have acknowledgements and synchronization requests and windowing and so forth but not at layer 3. all right don't shoot the messenger but now you know onward and upward we have dynamic bison in first place with 7547 points i'm super glad that you're here my objective uh for this channel is to help people get their cca ccnas i was gonna say ccis but that's the next step but ccnas that's my goal my my goal in life for this channel is to help people who honestly want to study and learn the technology and i can tell you why it will change your life it will it's a stepping stone it's not the end it's a stepping stone but you make this stepping stone i got my ccna back in 19 was it 1998 1999 yeah and then three years later i got my ccie but i studied almost all the way between that but it's a it's a game changer it's good to know and so once you get your ccna go on to the next step in the next step and my objective is to help you achieve that and get you there and some of these questions that i carve out are craft they are specific to help you understand the technology and confirm whether you get it or not if you don't you have time you're not taking the exam right now actually maybe i have a few people in discord who are taking it this weekend but if you're not taking the exam right this moment this is a great opportunity to practice and rehearse and get better all right question four of ten with inside sourcenet or pat what is the public address of the client there's four choices there's only one correct answer on the board good luck all righty all right so we show media there is also a video that i'm going to refer you to rather than covering this all again there's a video i did about i don't know 10 months ago and it is i'm not sure why i'm doing my hair there anyway that's what it chose to do it's called nat lingo for cisco ccna20301 and it talks all about inside outside local and global how you can use some really great ways to remember what those represent okay 33 of you nailed it way to go congratulations here we go next question uh oh balanced at ants just raised himself to or hurt themselves to 8090 points congratulations and uh tony said how old were you when you got your ccna keith uh let's see here let's do some quick math shall we um i was born in 1964 and i got my first ccna in 1990 this was 1998 1999 so somebody did the math on that you can determine how old i was when i got my ccie in 2001 i had five four or five children at that time i'm a father of seven and so was it easy to carve out enough time to study for that no was it worth it yes and it starts with your ccna so uh if you're looking for getting rid of any excuse consider me as one of those options of getting rid of all your excuses for not doing it oh you know life's so hard life is hard and it's not fair it's so not fair people have you know some benefits of being in the right place or time and so forth and it's not fair to people who aren't and but no matter what happens in life we can make it better we can't make it perfect but we can make it better by having little individual goals and applying ourselves and just getting a little bit better and continuing studying so my challenge for you i'm talking to you is get your ccna yeah do it don't don't no just just do it and do it in less than six months set a goal for at least six months or less uh if you set a goal for like two years it becomes a hobby and i i would prefer it not to be a hobby get your ccna and then use you know helping other people get their ccna as the hobby but keep on going for your ccnp or checkpoint or palo alto or you know whatever the technology or cloud amazon or google whatever you want to do but get it now and keep on going all right that's my i'll get off my soapbox but that's what i'd love you to do is get your ccna and i would love to help you get it all right moving on here's question five of ten what blank allocates and controls random access memory and cpu resources for virtual machines it's a hypervisor it's a hypervisor right good job most of you nailed that congratulations hypervisors control the environment for the vm they pull from the physical resources on the host and they allocate those dynamically to the virtual machines balanced and wow followed by lovely lion red finch dynamic bison an epic tiger okay we are more than halfway through here's question number six it is multiple select what does quote service password dash encryption end quote apply to what does that apply to wow that's great a lot of you got the right answers perfect future plain text passwords and current plain text passwords what the heck does that mean let's bring over a networking device this is a multi-layer switch if we do a show let's put a password on the vty lines config t line vty 0 through 15. actually let's go through zero through 100 let's see if it supports it yeah so i just created an extra what is it 100 minus 16 whatever that is uh 80 84 lines anyway for all those vty lines not that we would need that many if we did a password of uh say cisco which is a not a great password to use but i'm gonna go ahead and put that one in and then we do a do show line all right let's do a show run section line and survey says as it parses through the entire running config and it just shows me the line there's the password so if we use the command in global configuration mode service password encryption like that and then we hit the up arrow key a couple times and do a show run section line we're gonna see that is i call it encryption light really because it's not really applying an encryption that can't be broken in a few seconds if somebody gets this value but it is protecting it from somebody just casually doing shoulder surfing or looking over your shoulder at the config so it's better than nothing so any future plain text passwords it's going to apply to it also applies to any current plain text passwords and that's what service password encryption does all right all right all right all right moving forward here we go oh i had a question from who was it robert says what's your advice regarding self-paced learning and following your videos um let me bring in a small piece there for for the ccna everybody within the sound of my voice needs something to study that covers the entire blueprint that's what i call the the the exam topics from cisco you download from cisco has like six sections and each of the individual items what they expect you to know about uh so you want some course that covers all of that now for me i'm a visual learner i like video and i also read a lot too i read my wife she reads tons of books i read mostly uh just technical stuff but anyway you need some kind of full course that covers everything and it can be self-paced that's great there's lots of options out there for many of you who know me i work at cbt nuggets we've got a full offering it's subscription-based it costs money there's a lot of other options as well that don't cost money which are on youtube but something that covers everything and then maybe a good book to refer to as you study and then i would use that and then any topics you need to dive in further use this channel i mean whether it's spanning tree protocol or ospf or layer 2 switching or nat or security i've got over i probably over 200 videos i think all are ccna related including the quizzes and they've got playlists that help us with as well so i would say get some formal course of study robert that covers everything and then get a good book like todd lamley's book or wendell odin's book those are the two my two go-to books they're both great and then if you need deeper dives on those you can read you know read more and then my channel to help support it and if if somebody can go through my entire quiz playlist and just look at all the questions and say yep i understand why that's true and i can solve it on my own not just memorizing the answer that's a really good indicator that you're ready a really good indicator that you're ready because you're if you notice all my questions they are not they're not just like what's the default port for tftp it's more like uh you know which of these protocols are connectionless or connection oriented or whatever it is to try to infer your level of knowledge regarding those questions and i had somebody chat oh i hate the i hate these multiple guests multiple choice questions and that's great i and i posed a lot of these that way because i want them i want you to think about it and identify where you need to study and trust me trust me as you study and as you get better and better with the technology and you learn it you're going to use that and you can use that as you go forward so instead of just memorizing uh extended acls you should play close to the source why i have no idea that's not helpful ever ever not even in the current exam so um hey learning about for example access control lists and how they work and why we would use them and the options for them really learning it and having fun doing it that's the key if you can have fun in studies you can go ahead and just continue studying and have fun and not treat it like a drudgery because it is fun it's a lot of fun especially when you start learning a little bit and you can apply it and learn a little bit more it's just great stuff my goal is for you i'm talking to you specifically everybody to get your ccna and there's a lot of resources to do it and i want to be one that can help you do that as well all right balanced at is in first place regarding ntp network time protocol which of the following are true good luck everybody all these answers are true we can use authentication and if you're studying for your ccna as it talks about ntp and you know configuring ntp and verifying it i would lab it up at least once or twice i've got a few labs in my um my packet tracer labs they're at the keithbarker.com i've got like 30 plus package trays for labs several of them include ntp one includes authentication so i would practice with that it does use udp port 123 and routers can be clients or servers for ntp fantastic work all right here we go question 8 of 10 static ips were not not excluded from dhcp from the pool what happens oh my gosh good luck everybody so static ips were not excluded from dhcp what happens and the answer as many of you have jumped on as dhcp checks prior to the offer let's imagine uh well let's say let's bring up an interface let's do that let's go ahead and bring over this bad boy right right there so this is a multi-layer switch and let's see if it has a pool show ip dhcp pool if it doesn't oh yeah it does great great yesterday in the office hour every saturday at 10 a.m we hold the keith barker office hour on discord it's free show up and uh take your ccna related questions and we had a few extra minutes and we actually troubleshot some network gear and one of them was uh involved this server with this router with the http services running so we have a pool of addresses and what happens is if this device hands out an ip address what it's going to do by default you can change the behavior but by default this multi-layer switch the http server is going to try to ping the address let's imagine we're handing out the address of 101002 and the dhcp server gets a discover you get it before it provides the offer it does a ping to the ip address it's about to hand out and it's like why why would you do that the dhcp server wants to determine whether or not that i i gotta sneeze maybe not oh my goodness i do have to sneeze oh not fun all right i'll edit that out in the uh in the final product anyway uh the dhcp server is going to ping that address so that means it's also going to do an arp request for that ip address in attempt to ping it and if it doesn't answer the arp it's not going to be able to ping it because it doesn't exist it wants to verify that that ip address is not already in use but if that address that it was about to hand out responds back the rp comes back and then the ping works the dhcp server says oh my gosh i'm going to go ahead and remove this from my pool that's what it does so the dhcp server is going to check with the ping before handing out an ip address that it hasn't been already used somewhere statically and it's also going to remove it from the pool the conflicting ips and they're not both used because it won't it won't if it sees there's a conflict it won't use it and the pool isn't disabled but the actual ip address is removed from that pool it won't be used and that's also not true also on a cisco device if we go back here for a moment and let me bring up the device again that's why it's handy to lab up everything if we do a show ipdhcp my favorite cci trick you want to see it question mark all right show ipdhcp conflict there we go that'll show us whether or not there's been ip addresses that have been you know identified already in use that the dhcp server checked and saw and as a result of it getting a response back chose not to use it but currently this guy doesn't have any conflicts so we're in good shape a user was told to use 10.35.255.0 with a slash 13 as an ip address i gave you two minutes for this because i'd like you to answer based on the choices available which of the answers are true i am impressed i am that's a tough question um but those people who answered on yellow and green good on you and i also want to point everybody else who is needing to uh who wants to focus or learn a little bit more about ip dressing and subnetting which that's what this question is all about i've got a playlist called subnet saturday it is absolutely free here on youtube it is how many as 12 videos long and it'll walk you through the basics of ipv4 all the way through variable length subnet masking and trust me when i tell you if you're serious about learning subnetting and use and being able to calculate it accurately this is the playlist for you so i've had a lot of fun putting that together it's been around for over a year now and uh it's a winner so please take advantage of that if you'd like to so here's a confession from a double ccie when i see questions like this i've got to manually think it through to get it correct i do so if i have a question about this i'd first of all say well let's take a look at the bits of an octet 128 64 32 16 8 4 2 and 1 i'll tell you what let's just get my brain going if nothing else that gets my brain going like okay i can do this and that represents one byte of an octet of data of an ipv4 address so then i'd say okay 13 that's in the so right here is the first octet that's uh eight bits and then 9 10 11 12 13 and there's the new dividing line so everything over here is network and everything over to the right is host addressing so that means that the block size is eight so if you're brand new to subnetting uh that may be news to you but that's gonna be important because that helps us calculate the subnet so the block size is in 16 the block size based on this last bit of the mask that's on is eight and that means the subnets are going to be in the first octet we don't care in the second octet where this is the subnet's gonna be zero and you just add the block size and eight and eight more is 16 and eight more is 24 and eight more is 32 and eight more is 40 and eight more is 48 and that's a fun game that just goes on not forever because once you get past 256 here in the next octet so those are our subnets so if we took this right here 10.35 i'm just going to start right here at 1032. 10.32.0.1 is the first ip address the first usable idp address and the next one or the last address is one less than the next subnet so it would be through 39.255.254 be the last valid host with the broadcast being 255. which oh no look at that that is the broadcast address for that subnet this is the 1032 0 subnet with the slash 13 the broadcast address is this bad boy and the subnet is 1032 which was right there so it is a valid host address and um the block size is eight so again looking at this question i literally would have to just take a moment and think about it for your ccnas when you go for your ccna exam whether you take it physical or you take it virtual uh you know at your home or office or building whatever there's gonna be like 100 questions 100 203 and many of them if you know and have practiced and studied are going to be super easy it's like oh click oh click and then other ones like this don't worry if it takes you three or four minutes you may think well it's a hundred questions i gotta get through them all not this one this one you just you know go through the logic and if you're also a lot of this with a little practice you can get better over time and doing it in your head although whenever i teach it i always draw it out because i want to make sure everybody who's listening is with me on exactly how this was pulled off so yeah a question like this i would see it and i'd say oh i'm going to take two or three minutes on this one yep and then other questions where it's asking me about you know whatever uh where i don't need to take two or three minutes to do any calculations i just say oh yeah that's it subnet saturdays is the key to that and i encourage everyone who wants to get better at subnetting to go ahead and check that out here on youtube wow we have one final question now before before we do this uh let's also talk about uh right after so right after this question what i'll do is i'll stick around here for a few minutes in the on this live youtube youtube stream and take a few questions then right after that a lot of us jump into the discord server on my discord server and there's a link for that in this video description and i think today donald or kelvin or maybe both are going to do some demonstrations of stuff that uh are interesting they always are and if you'd like to hang out for that it's give me the ccna voice room on the discord server that's gonna be right after this stream so join us for that if you are if you're interested are available okay one last question this is for all the marvels good luck oh fast rhinos in first place all right um oh tough round three players lost their answer streak of four oh no all right here we go last chance to get points for this quiz question 10 of 10 here it is why would a router have a default route with an administrative distance or a d of 254 why is that all right and let's see how the answers came out on this all right all right it's not bad i put a little demo up here a little example of what's going on if we have a device such as a router that is a dhcp client and it's learning about a default route from the dhcp server it's going to have an administrative distance by default of 254 for that dynamically learned route and that's why yellow is the correct answer so with bgp let's talk about bgp for a moment so if we have router 1 and router 2 and they're running bgp the border gateway protocol and they have a neighborship if this guy is in autonomous system 100 and this guy's an autonomous system 200 it would be an external bgp neighborship if on the other hand we had r3 and r4 and they had an a bgp neighborship and r3 was in autonomous system 34 and r4 was in autonomous system 34. that would be an internal bgp neighborship and one of the big differences for from a ccna perspective of being aware of that is that if these guys were both advertising routes we'll say r1 is advertising the 1.1.1.0 network with 24-bit mask and r3 is advertising the 3.3.3 network with a 24-bit mask over here on r2 because it's learned via external bgp that route would have an administrative distance of 20 and r4 when it learned about the 333 network via internal bgp that route would have an administrative distance of 200. and that's going to have an impact regarding if those routes make it into the routing table if there's any competition from other routing protocols or sources for those routes there's another great video i would encourage you to watch it's called why routes have to win twice it's also on my youtube channel and uh let me just bring it over real quick and see if i can find that keith barker routes win twice let's see here all right there we go we're there so routes that must win twice that's a really great video to help understand the difference between administrative distance why we care how it works and then also once you have routes in the routing table then which ones are selected all right let's take a look at the let me move these out of the way let me clear off my screen and i'd like to thank trevor and also kelvin for helping me proof these quizzes this morning are these questions this morning always grateful to the admins on discord we have a i don't know about 6000 people all willing to help and here's the winner's table [Applause] [Music] faster i know faster i know faster i know all right fantastic fantastic and let's also do this i'd like a little bit of feedback if i um these are our toughest questions oh i am so glad that you're here these questions are a good gauge of readiness for certification for the topics that that our questions are on and so as a group excuse me we had 28 correct uh little room for improvement and out of the 10 questions we had eight that based on how they were answered were difficult so i appreciate you participating i will have this quiz i just check to make sure i'm recording it which i am and let me bring up this camera right here um i'm recording this locally and then what's up in about an hour from now i'm gonna pull down this video that was recorded on off of youtube and then i'm gonna go ahead and edit the recorded version to make it nice and tight that way for future use when you come back to the quiz playlist you can go to these nice short videos like 20 to 30 minutes which are indexed with chapters and you go right to the question and look at it pause it and then answer it and then move forward okay so thank you very much for uh let me get some feedback as well if you are have the app open or you're the web page for kahoot if you could go ahead and provide feedback that'd be awesome then what i'm going to do is i will be happy for about five to ten minutes to take any questions that you might have and then we'll uh we'll call it a day yeah i'm a little and also i'm gonna cut off the video here as far as the editing so anything that happens from here on out won't be part of the permanent record all right also uh if you have questions and you'd like to ask them go ahead let me show you my shirt real quick there we go there we go catnip made me do it my wife and i are we're cat fans we are we like a good cat so that's it for this quiz this recorded version and the edited version thanks for joining me if you want to participate in the live quizzes we have them every single sunday pacific time at 11am i'd love to have you there meanwhile have a great day and we'll catch you in the next live event [Music] and i wanna tell you straight

Channel: Keith Barker

Views: 2,057

Keywords: ccna, cisco, 200-301, Cisco CCNA, Cisco Certification, ogit, Keith Barker

Id: Q9rpDBM-hoU

Length: 33min 7sec (1987 seconds)

Published: Sun Jan 31 2021