Day 11 (part 1) Flashcards - Routing Fundamentals
A […] route is a route to the actual IP address configured on the interface.
local
A […] route is a route to the network the interface is connected to.
connected
A […] route is added to the routing table by a protocol (ie. OSPF) that allows routers to communicate with each other and share routing information.
dynamic
A […] route is manually configured by a network engineer/admin.
static
If a packet’s destination IP is matched by multiple routes, which route will the router select?
The most specific matching route
Local routes use a prefix length of […]
/32
Most specific matching route = the matching route with the […]
longest prefix length
Routers store routes to all of their known destinations in the […]
routing table
Show the routing table:
R1# […]
show ip route
The next router in the path to the destination is called the […].
next hop
What does code C in the routing table mean?
Connected
What does code L in the routing table mean?
Local
What prefix length do connected routes use?
The prefix length configured on the interface.
What will a router do if none of its routes match a packet’s destination IP address?
Drop the packet
When routers receive packets, they look in the […] to find the best route to forward that packet.
routing table
Which two routes are automatically added to the routing table when you configure an IP address on an interface?
1) a connected route
2) a local route
A […] route is often used to direct traffic to the Internet.
default
A default route is a route to [network]/[netmask].
0.0.0.0/0
Code […] in the routing table indicates a candidate default route.
*
Code […] in the routing table indicates a static route.
S
Configure a default route, specifying the next-hop IP:
R1(config)# […]
ip route 0.0.0.0 0.0.0.0 next-hop
Configure a static route, specifying the exit-interface and next-hop IP:
R1(config)# […]
ip route ip-address netmask exit-interface next-hop
Configure a static route, specifying the exit-interface:
R1(config)# […]
ip route ip-address netmask exit-interface
Configure a static route, specifying the next-hop IP:
R1(config)# […]
ip route ip-address netmask next-hop
For an end host like a PC to send packets outside of its local network, it will send the packets to its […].
default gateway
In the routing table, the output “Gateway of last resort is not set” means […]
a default route has not been configured
Static routes in which you specify only the […] appear as directly-connected in the routing table.
exit-interface
The […] route is the least specific route possible.
default
To send a packet to a destination, does a router need a route to every network in the path to the destination?
No
(It only needs a route to the destination network)
