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Which command(s) are required for all hosts to communic…

To minimize routing protocol traffic, you have decided to use static routing in the network displayed in the
following diagram.

You would like to keep the configuration as simple as possible.Which command(s) are required for all hosts to communicate with one another and the Internet? (Choose all
that apply.)

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A.
R1(config)#ip route 12.168.5.0 255.255.255.0 192.168.5.1

B.
R2(config)#ip route 0.0.0.0 255.255.255.0 192.168.5.2

C.
R1(config-if)# ip route 12.168.5.0 255.255.255.0 192.168.5.1

D.
R2(config-if)# ip route 0.0.0.0 255.255.255.0 192.168.5.2

E.
R2(config)#ip route 12.168.5.0 255.255.255.0 192.168.5.1

F.
R1(config)#ip route 0.0.0.0 0.0.0.0 192.168.5.2

Explanation:
There must be two routes added to make the network functional. From a conceptual standpoint, the network
requires the following two routes:
A static default route on R1 that directs all traffic destined for unknown networks (which would include
Internet-bound traffic) to R2
A static route on R2 to direct traffic destined for 12.168.5.0/24 to R1. Without this route R2 will be unable to
route return traffic to the 12.168.5.0/245 network even if the default route in the first bullet point has been
added.
The commands that would create these routes, respectively, are:
R2(config)#ip route 12.168.5.0 255.255.255.0 192.168.5.1
R1(config)#ip route 0.0.0.0 0.0.0.0 192.168.5.2
Troubleshooting routing problems should always begin with examining the routing table of the routers involved
in the path to the destination. If the routes are static, they will also appear in the output of the show run
command. One of the characteristics of a static route is that it will remain in the routing table even if routers on
the path to the destination network lose their route to the network. If an advertising router loses its route to a
destination network, dynamic routes will be removed from the routing tables of the routers that received that
advertisement.Static routes not only reduce routing update traffic in stub networks such as this one, but they also increase
security because only the network administrator may change the routing table. On the other hand, the
administrator must also stand ready to manually add new routes if current routes become unavailable. Dynamic
routing is designed to make these route changes automatically if alternate routes exist.
The commands R1(config-if)# ip route 12.168.5.0 255.255.255.0 192.168.5.1 and R2(config-if)# ip route 0.0.0.0
255.255.255.0 192.168.5.2 are incorrect because they are executed at an interface prompt, rather than at the
global configuration prompt as required.
The command ip route 12.168.5.0 255.255.255.0 192.168.5.1 is the correct command to create a static route to
direct traffic destined for 12.168.5.0/24 to R1. However, this command should be executed on R2, not at the R1
(config)# prompt.
The command ip route 0.0.0.0 0.0.0.0 192.168.5.2 is the correct command to create a static default route that
directs all traffic destined for unknown networks (which would include Internet-bound traffic) to R2. However,
this command should be executed on R1 and not at the R2(config)# prompt.
Objective:
Routing Fundamentals
Sub-Objective:
Configure, verify, and troubleshoot IPv4 and IPv6 static routing

Cisco IOS IP Configuration Guide, Release 12.2 > Configuring IP Routing Protocol-Independent Features >
Configuring Static Routes


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