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  • J
    Jorge Sosa

    Please correct me if I am wrong, but I've been thinking about it and I think having PCs in the native VLAN it's only a security issue when the switch's management IP is on the native VLAN as well.

    If you disagree, can you please explain why else would leaving PCs on the native VLAN be a security issue?

    Following my logic, as long as we configure the switch's management IP to be on a VLAN other than the native, there shouldn't be any security issue related to leaving PCs in the native VLAN.

    Please help me understand. Thanks

    posted in Cisco read more
  • J
    Jorge Sosa

    Hello There,

    I followed the instructions from your video on how to connect GS3 to the internet, but it still doesn't work. I have tried at all, and read multiple articles online and can't find the solution. My laptop has Windows7 Enterprise, and I have Windows firewall disabled. I've tried using the loopback and also by sharing the internet through ICS and sharing my wireless and wired adapters.

    Any help would be greatly appreciated

    posted in General Discussion read more
  • J
    Jorge Sosa

    Hello,
    I was trying to set up a default-gateway on a network comprised of pc -> router1 -> router2 -> server, and figured that the Pc can reach the Server when using in Router1 "ip route 0.0.0.0 0.0.0.0 router2", yet when trying to the same with the command "ip default-gateway router2", it wouldn't work. Hence I was wondering when would we use "ip default-gateway". I read online that usually only in switches and/or when ip routing is disabled, but I couldn't figure an scenario where that might apply. Can you please give me some insight?
    Thanks

    posted in Cisco read more
  • J
    Jorge Sosa

    Great! maybe you guys should have like a maillist where you can let us know what's new , what's coming so we don't annoy you with questions like this. Thanks

    posted in Cisco read more
  • J
    Jorge Sosa

    Thanks so much for your prompt answer @Ronnie-Wong !

    posted in Cisco read more
  • J
    Jorge Sosa

    Hello!
    In the troubleshooting episode of the CCENT show, when troubleshooting ACLs, in order for Don to figured why his pings towards where still going out to 4.2.2.1 in despite of the deny ACL, he had to recreate the ACL and add the "log" option at the end of an ACE specifically design to tackle this issue; I think it was something like: (config-if)#access-list 101 permit ip any host 4.2.2.1 log
    Anyway, I was wondering if there is another way to look at the incoming IPs for a particular interface, so that we don't need to create an ACL just to see this. Maybe using debug?
    Thanks

    posted in Cisco read more
  • J
    Jorge Sosa

    Hello,
    This week I've seen in the courses library "CCENT (update 2016)", which disappeared today from the list, and "CCNA X Routing and Switching", which is still there along with "CCNA Routing Switching". So I was wondering whether the CCENT update 2016 was merged with the current CCENT course? or it will re-appear in the following days as a separate course? also, is the "CCNA X Routing and Switching" course ready? such that if I'm about to start preparing myself for CCNA should I study that course instead of the previous "CCNA Routing and Switching"?
    Thanks

    posted in Cisco read more
  • J
    Jorge Sosa

    Found some more info for further clarification:

    • CIDR is the chunk of meat the provider gives you, VLSM is how you serve it to your guests
    • CIDR is a concept applied more at the ISP/Provider level. VLSM is a concept applied more at interior routing within an enterprise; a mechanism used by the recipient of a CIDR block.
    • CIDR allows super-netting for efficient advertisement and summarization of the domains at the higher level. For example, if an ISP owns network 172.16.0.0/16, then the ISP can offer 172.16.1.0/24, 172.16.2.0/24, and so on to customers. Yet, when advertising to other providers, the ISP only needs to advertise 172.16.0.0/16; This helps in reducing the size of full Internet BGP table
    • If the ISP / provider gives you a /24 CIDR block, you will likely use VLSM to subnet it into a smaller blocks

    Source: https://supportforums.cisco.com/discussion/10547531/what-difference-between-cidr-and-vlsm

    posted in Cisco read more
  • J
    Jorge Sosa

    Hello!
    I didn't get quite well what is the exact difference between CIDR and VLSM. It kinda same the same in the show; can you please explain a little further?
    Thanks

    posted in Cisco read more