A packet with the destination IP address 145.36.109.70 arrives at a router whose routing table is shown. Which interface will the packet be forwarded to?
Subnet Address | Subnet Mask (in CIDR notation) |
Interface |
---|---|---|
145.36.0.0 | /16 | E1 |
145.36.128.0 | /17 | E2 |
145.36.64.0 | /18 | E3 |
145.36.255.0 | /24 | E4 |
Default | $-$ | E5 |
Consider a network with three routers P, Q, R shown in the figure below. All the links have cost of unity.
The routers exchange distance vector routing information and have converged on the routing tables, after which the link Q-R fails. Assume that P and Q send out routing updates at random times, each at the same average rate. The probability of a routing loop formation (rounded off to one decimal place) between P and Q, leading to count-to-infinity problem, is _____________
The network uses a Distance Vector Routing protocol. Once the routes have stabilized, the distance vectors at different nodes are as following
N1 : ( 0, 1, 7, 8, 4 )
N2 : ( 1, 0, 6, 7, 3 )
N3 : ( 7, 6, 0, 2, 6 )
N4 : ( 8, 7, 2, 0, 4 )
N5 : ( 4, 3, 6, 4, 0 )
The cost of link N2 - N3 reduces to 2 in (both directions). After the next round of updates, what will be the new distance vector at node, N3?