A Mod 14 Routing Concepts HW

What are two functions of dynamic routing protocols?

to maintain routing tables to discover the network

Which value represents the "trustworthiness" of a route and is used to determine which route to install into the routing table when there are multiple routes toward the same destination?

administrative distance

What action will a router take on a packet with a destination IP address that is on a remote network?

It will forward the packet to a next-hop router

Which route entry would be used for a packet with a destination IP address that matches an IP address of one of the router interfaces?

L for local

What table does a router use to determine how to forward an IP packet?

routing table

What type of routing is typically used with a stub network?

Static routes

What are two reasons why an administrator might choose to use static routing rather than dynamic routing?

Static routing is more secure Static routing uses less router processing and bandwidth

What are two common types of static routes in routing tables?

a default static route a static route to a specific network

What metric is used by OSPF to determine the best path?

cost

Which type of routing automatically adapts to topology changes?

dynamic routing protocols

Which feature on a Cisco router permits the forwarding of traffic for which there is no specific route?

gateway of last resort

Which type of route would typically be used on a border router so that devices inside the company could access the Internet?

default

What is used to determine the minimum number of far-left bits that must match between the prefix in the route entry and the destination IP address

prefix length in the routing table

The output of the show ip route command contains the following entry: S 10.2.0.0 [1/0] via 172.16.2.2. What value is indicated by the 1 in the [1/0] portion of the output?

administrative distance

Which type of static route creates a gateway of last resort?

default static route

If a router needs to send an ARP Request for the IPv4 address in one of its route entries, this means the packet will be forwarded:

To a next-hop router

If a router needs to send an ARP Request for the destination IPv4 address of the packet, this means the packet will be forwarded:

To the device with the destination IPv4 address of the packet

What is an advantage of using dynamic routing protocols instead of static routing?

ability to actively search for new routes if the current path becomes unvailable

What term is used to describe routing over two or more paths to a destination with equal cost metrics?

equal cost load balancing

Which two route source codes are automatically created within a routing table whenever a router interface is configured with an IP address and activated?

C L

Which packet forwarding method is used by default on Cisco routers?

Cisco Express Forwarding

Which two route sources have the ability to automatically discover a new best path when there is a change in the topology?

EIGRP OSPF

A default route can only be a static route

False

What address and prefix length is used when configuring an IPv6 default static route?

::/0

When a router learns that multiple paths are available to a destination network from the same routing protocol, which factor is considered by a router to choose the best path to forward a packet?

The lowest metric

Which packet-forwarding method does a router use to make switching decisions when it is using a forwarding information base and an adjacency table?

Cisco Express Forwarding

What are two functions of a router?

It determines the best path to send packets A router connects multiple IP networks

Which routing table principle is not correct?

Routing information abouit a path from one network to another also provides routing information about the reverse, or return, path

A network administrator configures a static route for the same destination network that was learned automatically by the router using OSPF. Which route will be installed and why?

Static route because it has a lower administrative distance

Which three advantages are provided by static routing?

Static routing typically uses less network bandwidth and fewer CPU operations than dynamic routing does The path a static route uses to send data is known Static routing does not advertise over the network, thus providing better security

What type of network is accessed by a single route and the router has only one neighbor?

Stub network