Dynamic Routing?

[Hanry Zhou]

Which of the following are applications and components of dynamic
routing?




A Automatic router table updates for a 12 host network

B Dynamic routing is not supported by the InterNIC, because it creates unwanted traffic.

C OSFP and manually updated router tables

D Automatic router table updates and RIP or OSPF

E Manual router table updates and RIP

[Ron Kinner]

I'm glad I'm not taking your test. That is one super fuzzy question. The only thing we can say for sure is that we can throw out B as an answer. IF C is not a typo on your part we can throw it out too since the F and P are reversed.

The term "router table" is not a standard term and could be interpreted to mean either a list of routers or poorly written reference to "routing tables."

If it means router table then we might be able to say "none of the above."

Then again we could argue that OSPF does discover fellow routers running on the same LAN and put them in its adjacency table which is sort of the same thing and RIP and OSPF are both Dynamic Routing Protocols (DRP) so we could argue that D was a good answer. EIGRP has the concept of peers which are manually entered routers with which it is to exchange info so we could argue that E is good. A is kind of vague. We don't really care how many hosts the network has so that part of the statement is just a red herring. If we included D as right then we would have to consider A too since the questions says "components" - another undefined term which adds to the confusion.

Assuming they meant "routing tables" we can argue that A and D are correct since updating routing tables automatically is the job of a DRP and OSPF and RIP are both DRP. E (and C if it is your typo) is one that could go either way. If I manually update a routing table by adding a static route then the DRP will transmit it to the other routers so you could argue that manually enter routing tables are also a component of DRP.

So the final answers is the usual networking answer:

"It depends."

Ron

(tho if I were in a hurry I would just say A & D and go on.)

[Pete Randall]

E

[Sridhar Bhaskarla]

Since you specifically said applications and components I would say "D" as the best answer.

Remember a dynamic routing process should follow the followoing policies minimum.

1. Passes information about their reachable networks
2. Receives information from other routers
3. Dynamically updates the network changes
4. Determines the efficient route


Keeping in view the above, 'D' is the best answer. A is only a partial answer.

-Sri