DV, or routing 101...

just when you thought you were becoming proficient at routing, advanced concepts and the like, area id's and autonomous systems, ad infinitum, you suffer a setback with the likes of this:

a router has two primary functions:
path determination and packet forwarding

time to live (ttl) has a maximum value of 255, and has nothing to do with hop count
hop count refers to the number of routers a packet must pass through en route from source to destination

which of the above (path determination, packet forwarding) is hop count concerned with?

answer:
hop count determines distance and is placed in the routing table (path determination) while ttl determines how long a packet will be allowed to traverse the network before being discarded (packet forwarding)

easy, right?

see this link and curdle your brain http://www.ietf.org/rfc/rfc2453.txt

quiz...

1) what is the root bridge default priority?

2) what is the DOD equivalent of the OSI transport layer?

3) what is 90.37.200.31 in binary?

4)  /17.  how many subnets and hosts?

5)  what is the hop count for OSPF?

6) what kind of traffic does IGMP service?

7) IP is connection oriented? true or false

8) what is 2 to the 15th?

9) what does CHAP stand for?

10) how do you turn off CDP on an interface?

bonus:  what is the theme of this quiz?

answers after the trip