Day 11 (pt. 1) ROUTING

[...] is the process used to determine the path that IP packets should take over a network to reach their destination

routing

Routers store routes to all of their known destinations in a [...]

routing table

[...] Routing is used to share routing information with each other and build their routing table by using protocols like OSPF

dynamic

[...] Routing: a network engineer/admin manually configures routes on the router

static

A [...] tells the router to send the packet to destination 'X', you should send the packet to 'next-hop' Y; send the packet to itself (don't forward it); send packet directly to destination, etc.

route

Next-hop means

the next router in path to the destination

A [...] is a network that extends over a large geographical area.

WAN

Use the command [...] to view the routing table

R1#show ip route

The 'codes' legend that shows up after entering the command "show ip route" lists [...]

different protocols which routers can use to learn routes

The code 'L' stands for [...], a route to the actual IP address configured on the interface (with a /32 netmask)

local

The code 'C' stands for [...], a route to the network the interface is connected to (with the actual netmask configured on the interface)

connected

When you configure an IP address on an interface then enable [...], two routes (per interface) will be added to the routing table. (connected and local)

no shutdown

An end host trying to send a packet to a destination in a different network will forward the packet to its [...]

default gateway

A [...] route is a route the matches all possible destinations, and is used only if a more specific route match isn't found in the routing table.

default

A [...] route is a route to the exact IP address configured on the interface

local

In a local route, a /[...] netmask is used to specify the exact IP address on the interface. It means this # of bits are fixed, they cannot change

32

A route [...] a packets destination if the packets destination IP address is part of the network specified in the route

matches

A default route is configured with [IP address]/[prefix length]

0.0.0.0/0

If a packet is destined by both local and connected routes, the route will choose the [...] route

most specific matching

The /32 route is usually the [...] route

most specific

[...] route= keep the packet, don't forward

local

The most specific match in the routing table is the match with the longest [...]

prefix length

A direct, dedicated connection between two routers is called a [...] network.

point-to-point

Routers [...] packets with destinations that don't match any entries in the routing table

drop

Routers never [...] packets, if the router doesn't have a route to the packets destination it will drop the packet.

flood

What prefix length do connected routes use?

the prefix length configured on the interface

The IP address configured on a router interface will appear in the routing table as what kind of route?

local

What two types of routes are automatically added to the routing table when you configure an IP address on an interface and enable it?

connected and local