Routing

When a router using RIP receives routes from the same subnet with the same hop count and administrative distance, the receiving router will populate its routing table with the route?

Routing

With the lowest ip address

Routing

Difference between Routing and routed protocols?

- Routing protocols

• are the language that routers use to talk to each other
• A routing protocol sends and receives routing information packets to and from other routers
• Protocols used to communicate routing information between routers within an autonomous system are Interior Gateway Protocols (IGP), which are routing protocols, but not routed protocols
• Routing protocols gather and share the routing information used to maintain and update routing tables
•  Routing protocols are for updating
• RIP (Routing Information Protocol), IGRP
  
  

- Routed protocols

• routed protocol can be routed
• Routed protocols get routed
• are protocol suits that can be mapped to virtual addresses and operate on level 3 of the OSI model. 
• A routed protocol can be routed by a router, which means that it can be forwarded from one router to another
• A routed protocol contains the data elements required for a packet to be sent outside its host network or network segment
• IP/IPX
  
  

Routing

Config memory?

Configuration command used to configure NVRAM.

Loads the NVRAM into memory and allows the user to make changes to it

Routing

Concerning static routes,

If the subnet mask is ommitted?

If the administrative distance is omitted?  

The administrative distance is used to?

If the subnet mask is ommitted the IP class will default to the network number of the destination

If the administrative distance is omitted, it will default to 1 if the next hop is configured and 0 if the exit interface is configured

the administrative distance is used to statically assign the distance to the destination network

ip route destination_network_#{subnet_mask} IP_address_of _next_hop_neighbor {administrative_distance} [permanent]

ip route destination_network_#{subnet_mask} interface_to_exit{administrative_distance} [permanent]

Routing

Which command will dispaly a list of the names and IP addresses of all hosts known by the router?

Routing

Concerning show IP protocols, what timers are good to note?

update interval, hold time and purge time

- For RIP, update interval is every 30 seconds, the hold time is 180 seconds, and the purge time is 240 seconds.

- This means that under normal conditions, an update will be recieved within 30 seconds.

-THis update is kept in the routing table as active for 180 seconds.

- If no update is received within 180 seconds, the route is declared bad. 

-But, the router keeps the route just in case it recieves an update, but if no updates received within 240 seconds, the route is removed

The last update field indicates how long ago the last update for the particual network was recieved

Routing

What is an ISR router?

 Integrated Services Routers

 Many functions are integrated into a single device

Routing

Config register is how many bit number

16-bit number

Routing

The router choses to load the OS based on?

The low-order 4 bits in the configuration register and the details configured in any boot system global configuration commands found in the startup-config file

Routing

Where is the boot filed located in a router?