ASSIGNMENT $316$

Assume a router using RIP has $10$ entries in its forwarding table at time t$1.$ Six of these

entries are still valid at time $22.$ Four of these entries have expired $70,90,110,$ and $210$ seconds

before time $2.$ Find the number of periodic timers, expiration timers, and garbage collection

timers running at time $tl$ and time $t.$

A$)$

In 'Figure: $x\text{'},$ if each node periodically announces their vectors to the neighbor using the

poison$-$reverse strategy, what is the distance vector advertised in the appropriate period:

a$.$ from A to B $?$

b$.$ from $C$ to $D?$

c$.$ from D to B$?$

d$.$ from C to A $?$

B$)$

Assume that the network in 'Figure: $x\text{'}$ uses distance$-$vector routing with the forwarding table

as shown for each node. If each node periodically announces their vectors to the neighbor

using the split$-$horizon strategy, what is the distance vector advertised in the appropriate

period:

a$.$ from A to B $?$

b$.$ from $C$ to $D?$

c$.$ from D to B $?$

d$.$ from C to A $?$