Routing TCP/IP

An Interior Gateway Routing Protocol (IGRP) interior route is which of the following?

A path to a directly attached, subnetted route

Which would cause a router to update a route entry still in the holddown period set by previously received update?

A triggered update with a lower hop count than previously received

Which of the following is the generic routing protocol type that routers use to communicate within an autonomous system (AS)?

Interior gateway protocol (IGP).

Which router protocol type shares routing information within an autonomous system (AS)?

Interior gateway protocol (IGP).

Which three of the following are interior gateway protocol (IGP) examples? (Choose three.)

Interior gateway routing protocol (IGRP). Routing information protocol (RIP). Open shortest path first (OSPF).

A router that can receive packets from a neighboring router and forward them to at least one other router is called what?

Intermediate system (IS).

Which statement best describes an Open Shortest Path First (OSPF) virtual link?

It connects area border routes (ABR) over a nonbackbone area.

Which statement best describes an Open Shortest Path First (OSPF) area border router (ABR)?

It maintains a link-state database for each area to which it is connected.

Which statement correctly describes Class of Service (CoS) routing?

It makes routing decisions based on the packet's service category.

How does RIPV2 authentication protect routing table information?

It password protects routing table updates between routers.

Which statement best describes split horizons?

It prevents a router from advertising a route out to the interface on which the route was learned.

In what three ways does Open Shortest Path First (OSPF) control network routing table update traffic? (Choose three.)

It provides for partitioning networks into subdomains, called area routes. It supports multicast, rather than broadcast route update messages. It passes only route table changes, rather than entire tables.

What message type does border gateway protocol (BGP) send to test a connection's state?

KeepAlive.

In a link-state algorithm (LSA) shortest path first (SPF) tree, which three of the following are metrics the router uses to describe the cost to reach each destination network? (Choose three.)

Line speed. Line delay. Hop counts.

The broadcast packets used by link-state protocols to share routing information about neighbor routers are called what?

Link-state Algorithms (LSA).

Which advanced routing function allows for redundant paths between networks?

Load splitting.

A classful routing protocol can pass which three types of information in its routing table update messages? (Choose three.)

Metrics. Network numbers. Autonomous system (AS) numbers.

Which routing type allows networks to recover from failed routes?

Multipath routing.

An Open Shortest Path First (OSPF) autonomous system border router (ASBR) runs which two routing protocols? (Choose two.)

OSPF on interfaces on its own autonomous system (AS). Exterior Gateway Protocol (EGP) on interfaces on other autonomous systems (AS).

What is the primary difference between active and passive destinations in an enhanced interior gateway routing protocol (EIGRP) topology table?

Passive tables are stable and trusted.

Which routing information protocol (RIP) stability feature sets a route's hop count to 16, preventing further updates from setting an incorrect to unreachable network?

Poison reverse

In which three of the following ways does RIPV2 differ from routing information protocol (RIP)? (Choose three.)

RIPV2 adds a Route Tag routing table entry. RIPV2 supports variable length subnet masks. RIPV2 provides update message authentication.

Which two of the following are advantages gained from using static routes? (Choose two.)

Reduced network overhead /Added network security

Which two of the following are default Interior Gateway Routing Protocol (IGRP) features? (Choose two.)

Route update period = 90 seconds Maximum hop count = 100

Enhanced interior gateway routing protocol (EIGRP) was designed to replace or enhance which two previous routing protocols? (Choose two.)

Routing Information Protocol Interior Gateway Routing Protocol

Which two dynamic routing protocols create flat network topologies? (Choose two.)

Routing information protocol (RIP). Interdomain routing protocol (IDRP).

You maintain an autonomous routing network that runs RIPV1 as its routing protocol. You calculate that at the workday's busy hours, routing changes occurring on the nearest router take 45 seconds to propagate to the furthest router. In the past, this slow convergence has resulted in routing loops. How might you configure your routers to avoid creating routing loops when route changes occur within the network?

Set 50-second route update holddowns on all routers.

In what ways does open shortest path first (OSPF) improve upon the limitations of distance vector algorithm (DVA) protocols, such as routing information protocol (RIP)? (Choose three.)

Shortest Path First (SPF) technology resists routing loops. Routers exchange routing table updates only. All routing table exchanges are authenticated.

What does each link-state router build to describe the cost to reach each destination network?

Shortest path first (SPF) tree.

Which two statements are true concerning distance vector algorithm (DVA) routing protocols? (Choose two.)

Slow convergence can cause such problems as routing loops and lost packets. / They usually require fewer router resources to compute the best path to a destination network than do other routing protocols.

Concerning routing information protocol (RIP), what is meant by the statement "maximum diameter of 15 hops"?

Any single network cannot be more than 15 hops away.

Which two of the following are the interior gateway routing protocol (IGRP) default metrics? (Choose two.)

Bandwidth / Delay

Which three of the following cost factors might least cost routing use to calculate a minimum-cost path for a packet? (Choose three.)

Bandwidth. Delay. Cash costs.

Which of the following is another name for a distance vector algorithm (DVA)?

Bellman-Ford algorithm.

Which of the choices below is an example of an exterior gateway protocol (EGP)?

Border gateway protocol (BGP).

A router that an administrator designates to forward packets between autonomous systems (AS) is called what?

Border system (BS).

In which instance could you use Enhanced Interior Gateway Routing protocol (EIGRP) as a routing protocol?

Cisco routers in the same autonomous system (AS) as other Cisco routers.

In which instance could you use Interior Gateway Routing Protocol (IGRP) as a routing protocol?

Cisco routers in the same autonomous system (AS) as other Cisco routers.

To reduce routing information traffic between adjacent networks, Open Shortest Path First (OSPF) networks elect which two devices? (Choose two.)

Designated router (DR). Backup designated router (BDR).

How does enhanced interior gateway routing protocol (EIGRP) avoid routing loops?

Diffusing Update Algorithm (DUAL).

What type of network communication does not require a router's services?

Direct routing.

Border gateway protocol (BGP), though an exterior gateway protocol (EGP), operates as which type of routing protocol?

Distance Vector Algorithm (DVA).

In order to automatically build a routing table, which type of indirect routing must a router use?

Dynamic.

Which routing type allows network administrators to implement route load balancing and fault tolerance?

Dynamic.

Which of the following protocols scales better within a Cisco autonomous system?

Enhanced Interior Gateway Routing Protocol.

By default, how frequently do routing information protocol (RIP) routers send out response messages to neighbor routers?

Every 30 seconds

Which of the following protocols do autonomous systems (AS) use to exchange routing information between themselves?

Exterior gateway protocol (EGP).

What type of routing table update message does Interior Gateway Routing Protocol (IGRP) send to quickly remove a route and place it in holddown?

Flash updates.

Which two of the following result from using Open Shortest Path First (OSPF) routing areas? (Choose two.)

Greatly reduced routing information traffic within the entire autonomous system (AS). The development of a routing information hierarchy.

Open Shortest Path First (OSPF) routers send which type of packet to locate their neighbors?

Hello.

Which type of network architecture allows routers to perform different tasks depending on their functional position within an area?

Hierarchical.

Which three of the following are distance vector algorithm (DVA) stability features? (Choose three.)

Holddowns Hop-count limits Split horizons

Which three choices are Interior Gateway Routing Protocol (IGRP) stability features? (Choose three.)

Holddowns Split horizons Poison reverse updates

IP routing information protocol (RIP) uses which of the following metrics to make path decisions?

Hop count

Which metric does Interior Gateway Routing Protocol (IGRP) use on a network with only one medium, such as one running 16- Mbps Token Ring exclusively?

Hop count.

Which three of the following are examples of dynamic routing protocol metrics? (Choose three.)

Hop count. Line capacity. Transmission delay

How does routing information protocol (RIP) resolve the count- to-infinity problem?

Hop-count limits.

Quality of Service (QoS) routing uses which Internet protocol (IP) header field to make route decisions?

Type of Service (ToS).

In which two ways might using static routes provide additional network security over other routing options? (Choose two.)

They can limit packet traffic to only a single, dedicated route. /They share no routing information with other

Router 1, a routing information protocol (RIP) router in a two- router network, informs its neighbor, Router 2, of a route to the new, directly connected Network A. Router 2 updates its routing table accordingly. Almost immediately, Router 1's link to Network A fails. Router 1 prepares its regular update for Router 2, excluding the Network A entry from the update message. While Router 1 is waiting for its update timer to expire, Router 2 sends its regular update message to Router 1. This update tells Router 1 that Router has a new route to Network A, with a hop count of 1. This route is through Router 2 back to Router 1, although Router 1's link to Network A is still failed. Which RIP stability feature will prevent this problem?

Split horizons

Considering the default Cisco router default administrative distances (AD), which of the following routes will a router consider more trustworthy than the others?

Static route.

Which three choices are indirect routing types? (Choose three.)

Static. Default. Dynamic.

On which network type is a static route best used?

Stub.

Which statement is true concerning IP routing?

The destination and source media access control (MAC) addresses change at each hop.

Which enhanced interior gateway routing a protocol (EIGRP) routing table keeps list of neighbors which are directly attached to one of the router's interfaces?

The neighbor table.

A router makes its packet forwarding decisions based on what information?

The router's routing table.

Distance vector algorithms (DVA) operate in which manner?

They advertise their routing tables to directly connected neighbor routers.