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Q:

A network administrator needs to configure a router with a distance-vector protocol that allows classless routing. Which of the following satisfies those requirements?

A) IGRP B) OSPF
C) RIPv1 D) EIGRP
 
Answer & Explanation Answer: D) EIGRP

Explanation:

In this question, we're calling EIGRP just plain old distance vector. EIGRP is an advanced distance-vector routing protocol, sometimes called a hybrid routing protocol because it uses the characteristics  of both distance-vector and link-state routing protocols.

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Q:

You need the IP address of the devices with which the router has established an adjacency. Also, the retransmit interval and the queue counts for the adjacent routers  need to be  checked. What command will display the required information?

A) show ip eigrp adjacency B) show ip eigrp topology
C) show ip eigrp interfaces D) show ip eigrp neighbors
 
Answer & Explanation Answer: D) show ip eigrp neighbors

Explanation:

The show ip eigrp neighbors command allows you to check the IP addresses as well as the retransmit  interval and queue counts for the neighbors that have established an adjacency.

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Q:

With which network type will OSPF establish router adjacencies but not perform the DR/BDR election process?

A) Point-to-Point B) Backbone area 0
C) Broadcast multi-access D) Non-broadcast multi-access
 
Answer & Explanation Answer: A) Point-to-Point

Explanation:

No DR is assigned on any type of point-to-point link. No DR/BDR is assigned on the NBMA point-to-multipoint due to the hub/spoke  topology. DR and BDR are elected on broadcast and non-broadcast multi-access network. Frame relay is a non-broadcast multiaccess (NBMA) network by default.

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Q:

If routers in a single area are configured with the same priority value, what value does a router use for the OSPF Router ID in the absence of a  loopback interface?

A) The Lowest IP address of any physical interface B) The Highest IP address of any physical interface
C) The Lowest IP address of any logical interface D) The Highest IP address of any logical interface
 
Answer & Explanation Answer: B) The Highest IP address of any physical interface

Explanation:

At the moment of OSPF process startup, the highest IP address on any active interface will be the Router ID (RID) of the router . If you have a loopback interface configured (logical interface), then that will override the interface IP address and become the RID of the router automatically.

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Q:

Two connected routers are configured only with RIP routing. What will be the result when a router receives a routing update that contains a higher-cost path to a network already in its routing table?

A) The updated information will be added to the existing routing table B) The update will be ignored and no further action will occur
C) The updated information will replace the existing routing table entry D) The existing routing table entry will be deleted from the routing table and all routers will exchange routing updates to reach convergence
 
Answer & Explanation Answer: B) The update will be ignored and no further action will occur

Explanation:

When a routing update is received by a router, the router first checks the administrative distance (AD) and always chooses the route with the lowest AD. However, if two routes are received and they both have the same AD and differing metrics , then the router will choose the one route with the lowest metrics or , in RIP's case, hop count.

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Q:

What is the subnetwork address for a host with the IP address 200.10.5.68/28?

A) 200.10.5.56 B) 200.10.5.32
C) 200.10.5.64 D) 200.10.5.0
 
Answer & Explanation Answer: C) 200.10.5.64

Explanation:

This is a pretty simple question. A/28 is 255.255.255.240, which means that our block size is 16 in the fourth octent. 0,16, 32, 48, 64, 80, etc. The host is in the 64 subnet.

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Q:

Which layer ensures the trustworthly transmission of data across a physical link and is primarily concerned with physical addressing, line discipline, network topology, error notification, ordered delivery of frames, and flow control?

Answer

PDUs at the data link layer are called frames and provide physical addressing, plus other options to place packets on the network medium.

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Q:

Which layer chooses and determines the availability of communicating partners along with the resources necessary to make the connection, coordinates partnering applications, and forms a consensus on procedures for controlling data integrity and error recovery?

Answer

The application layer is responsible for finding the network resources broadcast from a server and adding flow control and error control (if the application developer chooses)

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