1. Create a router table for Router T, showing the destination network and the next hop. Assume all network addresses use a /8 mask. Router R should be the default next hop.
2. Using the figure from question 1, create a router table for Router Q, showing the destination network and the next hop. Assume all network addresses use a /8 mask. Router R should be the default next hop.
3. A router XX has forwarding table:
Network/Mask Next_Hop
184.211.212.0/24 deliver directly
184.211.220.0/22 175.129.184.1
184.211.212.0/22 175.129.170.1
184.211.200.0/21 175.129.178.1
184.211.218.0/23 175.129.172.1
0.0.0.0/0 175.129.178.1
Explain what router XX will do with packets with the following destination addresses. Make sure to use longest prefix routing.
a. 184.211.212.108
b. 184.211.218.17
c. 184.211.222.44
d. 184.211.214.128
e. 183.211.218.7
f. 184.211.213.54
g. 184.211.202.20
h. 184.211.215.17
i. 184.212.212.5
j. 184.211.219.32
4. Connect to afs25.njit.edu. If you don't know how see the NJIT tutorial (https://www.njit.edu/tlt/resources/animations/tutorial.php?title=Connecting%20To%20NJIT&path=network/ssh/connecting_to_njit). You may use another host if afs25 is down - just tell me which one you are using.
Perform the following. Type "netstat -rn" to display the routing table in this host.
a. Copy paste the results into the homework (along with the host name)
b. Identify the following IP addresses:
i. Default router
ii. Loopback address
iii. Current machine
5. Routers M and N use the RIP routing protocol
The original routing table (simplified for the purpose of this problem) in M is:
Destination Distance Route
Net 1 0 direct
Net 2 0 direct
Net 3 10 L
Net 4 7 A
Net 5 2 N
Net 6 5 C
Net 7 14 J
Router N sends its table to M:
Destination Distance
Net 2 1
Net 3 5
Net 4 7
Net 5 8
Net 8 15
Net 9 14
Net10 0
Show the contents of the routing table in M after it has been revised to reflect the information from N.
EXTRA CREDIT
1. (6pts)An ISP has CIDR block 198.124.0.0/14. The ISP wants to create 21 sub-blocks from this block.
a. How many bits should the ISP add to the mask for the subblocks?
b. What are the addresses in binary and dotted decimal for each subblock?
c. What is the maximum number of hosts in each subblock?
2. (5pts)We wish to assign a CIDR block of 2000 addresses (including all 0's and all 1's), starting at 175.144.120.0.
a. What is the maximum address in this block?
b. How many bits are in the host_id?
c. How many bits are in the net_id?
d. What is the mask in binary, dotted decimal, and slash notation?
e. Explain why we can or cannot have a block of 5000 addresses?
3. (3pts) A CIDR block extends from 212.145.137.0 to 212.145.156.255.
a. How many bits are in the net id?
b. How many bits are in the host id?
c. What is the mask in binary, dotted decimal, and slash notation?