Talk:Web Science/Part1: Foundations of the web/Internet Protocol/IP forwarding algorithm

Question to "Check your understanding #1"

I don't really understand why entries 12.3.1.1 and 14.31.0.1 are not valid for routing tables with CIDR. Host-only routes are allowed in routing tables - like 12.3.1.1/32 and 14.31.0.1/32. Of course subnet routes are used much more often, but in some situations it is necessary to add a host route (with mask 255.255.255.255) to direct all the traffic to this address through a different route (e.g. VPN-tunnel). --Sergeyd (discuss • contribs) 14:41, 29 October 2013 (UTC)

Question about CIDR

Why 192.162.2.0 is not valid without CIDR? It's class C network, not B, so we can use 3rd byte. If I understood it correctly, we can use only 1st byte of address for A network, 1&2 for B, 1&2&3 for C. --oleamm (discuss • contribs) 12:11, 13 February 2014 (UTC)

You are correct, for question 1 , 192.162.2.0 is the valid one without CIDR, and 192.162.0.0 is an invalid network address in Clasfull (without CIDR) --134.159.168.72 (discuss) 08:44, 2 December 2015 (UTC)

whole picture of example network

It would be really helpful for learning if we have whole picture of this network, coz in the video it appears for several seconds and it's had to see there ip addresses there. Can you upload it for us if it's possible, please? --Ann Presnyakova (discuss • contribs) 20:51, 3 November 2014 (UTC)

5:22

Why on the router routing table, for network 67.0.0.0 next hop is 67.68.50.1, not 67.68.50.13 ? So 67.68.50.1 will receive a data and translate it to other members? Same about 62.209.17.3 ? Typo? Should be 62.206? --188.97.4.248 (discuss) 19:07, 9 November 2017 (UTC)

Quiz task1

Should 192.162.2.0 not be accepted without cidr as well since the first 24 bits are the network part? --88.76.68.10 (discuss) 13:14, 12 February 2019 (UTC)