How many version of RIP
Two versions
RIPV1
RIPV2
What is the major difference between RIPV1 and RIPV2
RIPv1 is a classful routing protocol, whereas RIPv2 is classless
Which algorithms used by distance vector protocols
Bellman Ford and Fulkerson
Operation of RIP
What is the metric for RIP
Hop count
Which UDP port used by RIP process
Port 520
How RIP messages are encapsulated
In UDP segment
Which are the message types for RIP
Request message and Response Message
What is request message
Ask neighbor router to send an update
What is response message
Carries the update
What is the metric for RIP
Hop count
What does metric 1 and 16 signify
1 Directly connected network
16 Unreachable network
What happen on Startup of RIP process
RIP broadcast request message packet on RIP enabled interface
Enters into loop
Listen for Response message or request message from other routers
What does neighbor response with when they receive request message
Their routing table
What action taken by router when they receive response message
Router receive response message
Include route entries
New route entry found in the response message
Route entry is made into routing table
Also include address of advertising router
Receive existing route entry with lower hop count
Route entry will be replaced in the routing table
Receive existing route with higher hop count
Route will be marked as unreachable for holddown period
Receives existing route entry with same higher hop count
Route will be accepted
How often RIP send response message out every RIP enabled interface
Every 30 seconds
What does response message or update contains
Routers full routing table
Not include route suppressed by split horizon rule
What is the destination address for the update message
Broadcast address 255.255.255.255
What is invalid or expiration timer
Amount of time a route can stay in a routing table without being updated
How expiration timer is initialized
Initialized to 180 seconds
New route is established
Update is heard for the route
What happen if update for a route is not heard within 180 seconds
Hop count of that route is changed 16
Making it unreachable
What is garbage collection or flush timer
Set to 240 seconds
60 seconds longer than expiration timer
Route is removed from routing table after garbage collection timer expires
What is holddown timer
An update with a hop count higher than the metric recorded in the routing table will cause the route to go into holddown for 180 seconds
What is the command to manipulate different timers on RIP
timers basic update invalid holddown flush
Timers should be change for all routers in the RIP domain
What features employed by RIP
Split horizon with poison reverse and triggered updates
What is triggered update
Generate when a metric for a route is change
Include only the entry that has been changed
Does not cause receiving router to reset its timers
What is silent host in RIP
Do not generate RIP updates
Listen for the updates and update their internal routing table
Two versions
RIPV1
RIPV2
What is the major difference between RIPV1 and RIPV2
RIPv1 is a classful routing protocol, whereas RIPv2 is classless
Which algorithms used by distance vector protocols
Bellman Ford and Fulkerson
Operation of RIP
What is the metric for RIP
Hop count
Which UDP port used by RIP process
Port 520
How RIP messages are encapsulated
In UDP segment
Which are the message types for RIP
Request message and Response Message
What is request message
Ask neighbor router to send an update
What is response message
Carries the update
What is the metric for RIP
Hop count
What does metric 1 and 16 signify
1 Directly connected network
16 Unreachable network
What happen on Startup of RIP process
RIP broadcast request message packet on RIP enabled interface
Enters into loop
Listen for Response message or request message from other routers
What does neighbor response with when they receive request message
Their routing table
What action taken by router when they receive response message
Router receive response message
Include route entries
New route entry found in the response message
Route entry is made into routing table
Also include address of advertising router
Receive existing route entry with lower hop count
Route entry will be replaced in the routing table
Receive existing route with higher hop count
Route will be marked as unreachable for holddown period
Receives existing route entry with same higher hop count
Route will be accepted
How often RIP send response message out every RIP enabled interface
Every 30 seconds
What does response message or update contains
Routers full routing table
Not include route suppressed by split horizon rule
What is the destination address for the update message
Broadcast address 255.255.255.255
What is invalid or expiration timer
Amount of time a route can stay in a routing table without being updated
How expiration timer is initialized
Initialized to 180 seconds
New route is established
Update is heard for the route
What happen if update for a route is not heard within 180 seconds
Hop count of that route is changed 16
Making it unreachable
What is garbage collection or flush timer
Set to 240 seconds
60 seconds longer than expiration timer
Route is removed from routing table after garbage collection timer expires
What is holddown timer
An update with a hop count higher than the metric recorded in the routing table will cause the route to go into holddown for 180 seconds
What is the command to manipulate different timers on RIP
timers basic update invalid holddown flush
Timers should be change for all routers in the RIP domain
What features employed by RIP
Split horizon with poison reverse and triggered updates
What is triggered update
Generate when a metric for a route is change
Include only the entry that has been changed
Does not cause receiving router to reset its timers
What is silent host in RIP
Do not generate RIP updates
Listen for the updates and update their internal routing table
