ISP cluster, and the Web server are completely configured. You must create a new IPv4 addressing scheme that will accommodate 4 subnets using the 192.168.0.0/24 network. The IT department requires 25 hosts. The Sales department needs 50 hosts. The subnet for the rest of the staff requires 100 hosts. A Guest subnet will be added in the future to accommodate 25 hosts.

1. Kelly works for an ISP and has been asked to set up the IP addressing scheme for a new region of the city they are providing with Internet service. She is provided the Class B address of 141.27.0.0/16 as a starting point and needs at least 25 subnets. What is the custom subnet mask for this, how many networks does this allow for, and how many hosts will be available on each subnet?

How to forward to a border router? Consider the network shown below. Suppose AS1, AS2, AS3, and AS4 are running OSPF for their intra-AS routing protocol and that all links have a weight of 1. Initially suppose there is no link between AS2 and AS4. Once router 1d learns about destination x, it will need to install a forwarding table entry to x. Indicate which one of the statements below are true. 3b 3c AS 3 3a 4c 1a 4b 21 AS 4 1c AS 1 1d 22 4a 1b X 2a 2c AS 2 2b 1d will forward along z2 since BGP has computed the path to 1c is via z2. 1d will forward along z2 since OSPF has computed the path to 1c is via z2. 1d will forward along z1 since hot potato routing forwards clockwise. 1d will forward along z1 since BGP has computed the path to 1c is via z1. 1d will forward along z1 since OSPF has computed the path to 1c is via z1.

In your own words, describe what happens at every step of our network model, when a node on one network establishes a TCP connection with a node lon another network. You can assume that the two networks are both connected to the same router. You must include a detailed explanation of the following: • Physical layer • Data link layer • Network layer Transport layer • MAC address •IP address