Why Is Fast Convergence Desirable In Networks That Use Dynamic Routing Protocols?

what is ospf?

OSPF (Open Shortest Path First) is a router protocol used within larger autonomous system networks in preference to the Routing Information Protocol (RIP), an older routing protocol that is installed in many of today's corporate networks. OSPF is designated by the Internet Engineering Task Force (IETF) as one of several Interior Gateway Protocols (IGPs).

Practical use of BGP & EIGRP?

I want to know about effective use of BGP & EIGRP protocol. Please let me know in simple language and illustration how and why should one use such protocols?

EIGRP --> Dynamic routing protocol (like rip, igrp, bgp, etc) for only Cisco to Cisco devices.

BGP --> Dynamic Routing Protocol, but works on all vendors, and is especially used, as its name suggest, on very large network. Practically, it is used for the INTERNET that we use.

What type of routing protocol takes place when no routing protocol is present?

The type of routing that takes place when no routing protocol is present is called: a. Dynamic Routing b. Default Routing c. Static Routing d. None of these I am thinking it is none of these, however I know a standard home router will default to dynamic but the question specifies when NO routing protocol is present, Any idea? It seems this question is just not a good one. Thanks anyway!

The question is misleading because both B and C can be correct.

Let me give you an example:

On a typical network when a computer gets an IP address it also gets a default gateway which is where it sends all traffic that is destined for a host which is not on the local subnet. So I would consider that to be "default routing", although I've never seen that as an official term.

You can also set up static routes either on individual computers or on routers.

Both of the above can be done without using any routing protocol.

Explain what makes routed and routing protocols different.(?

A routed protocol is one that can be sent across multiple routes. For example IP (TCP and UDP) are a routed protocol. Microsoft NetBIOS is not a routable protocol.

A routing protocol provides a router with it's available destinations. Examples of routing protocols are RIP, IGRP, OSPF, EIGRP, IS-IS, BGP etc etc.

what are the advantages of OSPF?

OSPF is actually a routing protocol on a lot of things, not just a windows server. OSPF has a number of advantages over other protocols.

OSPF is a link-state protocol, so less information is sent over the network as a whole. It also has full support for VLSM/CIDR, although quite a few protocols do nowadays. It also supports basically infinite hops; whereas other protocols tend to be limited at around 15.

OSPF allows loop-backs, sure, but a loopback can be established without a routing protocol.

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