Router Question 2

[Skittle]

Routers are covered as part of my Network+ course.

One thing that isn't explained is how a router knows which hub or network segment to send data too. For example imagine a network with two hubs both of which connect to a the same router which in turn connects to a 'backbone' bus cable. Traffic will be directed from the backbone to one hub or the other by the router to the required destination.

Does the router work it out at boot up time by listening to all the IP addresses attached to each hub and then creating a table in memory?

 

[glister]

There are two ways to accomplish this: Static & Dymanic Routing:

Static Routing

Routing table entries can be manually configured by a network operator. This is called static routing.

Dynamic Routing

Dymanic routing adjusts in real time to network changes by analysing routing update messages. There are two main processes involved in dynamic routing.

These are:

• Information distribution, where each router sends and receives routing information within the internetwork using a routing protocol such as, BGP, OSPF and RIP.

• Route calculation, where each router calculates the best path to each destination using an algorithm and the information received using the routing protocols.

A+,N+,S+,L+,I+,HTI+,CET,CST,CNST,CNCT,CFOT,CCNT,ACSP,ISA CCST3

 

[Skittle]

Thanks for the info.
Static routing must need a more advanced router than your average router you buy at the local computer equipment store? Because I assume they would come with software to use in conjunction with it? I have a router at home that links two PC's to the internet and acts as a firewall. It came with some software that I did not have to configure so I guess it would include static routing settings facilities?

 

[campyracr]

In most firewall/routers (from a computer store) have the ability to set static routes. Unless you are talking hundreds of PCs I wouldn't worry about setting a static route between PCs with just 2 hubs, and a store bought router.

The router, hubs & NICs all work pretty darn fast at reading data packets, passing what is not theirs and accepting what is.

 

[Skittle]

Ok thanks.

Dazed and confused