Ch.16 Configuring IPv4 Addresses and Static Routes

Question 1

What is the first step of a router routing logic

Answer 1

For each received data-link frame, choose whether or not to process the frame

Question 2

What is the second step of a router routing logic

Answer 2

De-encapsulate the packet from inside the data-link frame

Question 3

What is the third step of a router routing logic

Answer 3

Make a routing decision

Question 4

What is the fourth step of a router routing logic

Answer 4

Encapsulate the packet into a data-link frame appropriate for the outgoing interface

Question 5

What is the fifth step of a router routing logic

Answer 5

Transmit the frame out the outgoing interface

Question 6

What are the three ways a router adds routes to its configuration

Answer 6

Connected routes
Static routes
Routing protocols

Question 7

What is another name for a static route

Answer 7

network route

Question 8

Define default route

Answer 8

Matches all destination IP addresses

Question 9

Define a host route

Answer 9

When a single ip address is matched to an mac address

Question 10

What command allows you to configure a static rout

Answer 10

ip route

Question 11

What is a floating static route

Answer 11

A static IP route that uses a higher administrative distance than other routes. Mostly used if the preferred method of routing protocol fails

Question 12

How to set the administrative distance in the command IP route

Answer 12

ip route (ipaddress) (subnet mask) (ipaddress of router / destination) (ad value )

Question 13

What do you do when troubleshooting Incorrect Static Routes That Appear in the IP Routing Table

Answer 13

1. Check if there is a subnetting math error in the subnet ID and mask
2. Is the next-hop IP address correct and referencing an IP address on a neighboring router
3. Does the next-hop IP address identify the correct router
4. Is the outgoing interface correct, and referencing an interface on the local router

Question 14

What do you do when troubleshooting The static route does not appear in the IP routing table

Answer 14

1. For ip route commands that list an outgoing interface, that interface must be in an up/up state
2. For ip route commands that list a next-hop IP address, the local router must have a route to reach that next-hop address

Question 15

The correct static route appears but works poorly

Answer 15

1. Check that the route is properly configured and keep an out out for a configuration with a permanent route applied
2. Check for other possible issues outside of the routing configuration

Question 16

What odes a router when a destination IP address matches more than one route in a routers IPv4 routing table

Answer 16

The router uses the most specific route- in other words, the route with the longest prefix length mask

Question 17

show ip route

Answer 17

Lists the routers entire routing table

Question 18

show arp, show ip arp

Answer 18

Lists the router IPv4 ARP table

Question 19

clear ip arp [ip-address]

Answer 19

Removes all dynamically learned ARP table entries, or if the command lists an IP address, removes the entry for that IP address only