Data Communications and Networking 3

Data Communications and Networking 3
(MidQ-1, 2, Midterm)


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What is the default maximum amount of bandwidth that EIGRP uses for EIGRP control information considering an interface configured for 128 kbps?

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What is the purpose of the EIGRP Null0 summary route?

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Which statement is correct about multiarea OSPF?

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The wildcard mask that is used to advertise exactly the network 192.168.160.0 with subnet mask 255.255.240.0 is 

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OSPF features,  It quickly propagates network changes

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OSPF featuresOSPFv2 is classless by design; therefore, it supports IPv4 VLSM and CIDR.

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A network administrator is analyzing the differences between an EIGRP hold timer and EIGRP hello interval. What statement is valid about EIGRP hello and hold timers?


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The OSPF Type 1 packet is the  packet.

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What is a disadvantage of using EIGRP automatic summarization?


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The command clear ip ospf   forces a router with a new or changed router ID to form new adjacencies.

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When would the network administrator use the ip bandwidth-percent eigrp as-number percent command?

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A router is running an EIGRP process and obtaining updates from other routers. What is an indication within the routing table that a route is a candidate for a default route?

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A network technician issues the following commands when configuring a router:

R1(config)# router ospf 11

R1(config-router)# network 10.10.10.0 0.0.0.255 area 0

 What does the number 11 represent?


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Two routers, R1 and R2, have established an EIGRP neighbor relationship, but there is still a connectivity problem. Which issue could be causing this problem??

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Which OPSF packet contains the different types of link-state advertisements?

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A network administrator configures a loopback interface as the OSPF router ID with the IP address of 192.168.1.1/30. What could be the consequence of using this 30-bit mask for the loopback interface?

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Which EIGRP parameter must match between all routers forming an EIGRP adjacency?


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Which command will limit the bandwidth that is used by EIGRP process 1 to 20%? 

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OSPF features,  Routing changes trigger routing updates (no periodic updates). It uses the SPF algorithm to choose the best path.


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The OSPF hello timer has been set to 15 seconds on a router in a point-to-point network. By default, what is the dead interval on this router?

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Which routing protocol was designed by the International Organization for Standardization (ISO)?

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How can a network administrator reduce SPF overhead on OSPF routers?

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Which bandwidth value is used when calculating the EIGRP metric of a route?

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Which algorithm is used by the OSPF routing process to construct the SPF tree on a router?

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What loop prevention technique is implemented by distance vector routing protocols?


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In the command router eigrp 100, what does the value 100 represent?

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Which protocol number is used to indicate that an EIGRP packet is encapsulated in an IP packet?


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used to confirm the reliable delivery of a packet.

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  are used by routers to facilitate the exchange of routing

information between routers.

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Which multicast address does an EIGRP-enabled router use to send query packets?

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 used to distribute routing information

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Which routing protocol uses the DUAL algorithm and sends multicast messages to propagate routing updates?

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 used to form an EIGRP neighbor relationship

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What is an advantage of OSPF compared to RIP?

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Which routing protocol uses the Diffusing Update Algorithm to install routes into the routing table?


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Which routing protocol uses both bandwidth and delay to determine the best pathway to reach a remote network?

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What address and wild card mask can be used to enable EIGRP for only the subnet 192.168.100.192 255.255.255.192?

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Which operation feature is different between EIGRP and RIP?


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Which classless routing protocol supports VLSM and CIDR, supports manual route summarization, and uses the multicast address 224.0.0.9?

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 Classful or Classless- Routing protocols characteristics do not include the subnet mask and cannot support VLSM.


224.0.0.10- Which multicast address does an EIGRP-enabled router use to send query packets?

IS=IS - Which routing protocol was designed by the International Organization for Standardization (ISO)?

 The OSPF Type 1 packet is the hello packet

 OSPF features, Fast convergence It quickly propagates network changes

Which statement is correct about multiarea OSPF? Arranging routers into areas partitions a large autonomous system in order to lighten the load on routers. 

A network technician issues the following commands when configuring a router; the OSPF process ID on R1

Which routing protocol uses both bandwidth and delay to determine the best pathway to reach a remote network? EIGRP

OSPF features Classless OSPFv2 is classless by design; therefore, it supports IPv4 VLSM and CIDR.

Routing protocols used to distribute routing information


One of the four distance vector IPv4 IGPs refers as First generation Cisco proprietary protocol (obsolete and replaced by EIGRP) IGRP

What loop prevention technique is implemented by distance vector routing protocols? split horizon

Link-state routing protocols apply Dijkstra’s algorithm to calculate the best path route.

EIGRP One of the four distance vector IPv4 IGPs refers as Advanced version of distance vector routing

How can a network administrator reduce SPF overhead on OSPF routers? Implement multiple areas of OSPF.

In the command router eigrp 100, what does the value 100 represent? the autonomous system number

Dynamic routing protocols are used by routers to facilitate the exchange of routing information between routers

Which classless routing protocol supports VLSM and CIDR, supports manual route summarization, and uses the multicast address 224.0.0.9? RIPv2

What address and wild card mask can be used to enable EIGRP for only the subnet 192.168.100.192 255.255.255.192? 192.168.100.192 0.0.0.63

One of the four distance vector IPv4 IGPs refers as Simple distance vector routing protocol RIPv2 

What is the default maximum amount of bandwidth that EIGRP uses for EIGRP control information considering an interface configured for 128 kbps? 64kbps

Which EIGRP parameter must match between all routers forming an EIGRP adjacency? autonomous system number

Which OPSF packet contains the different types of link-state advertisements? LSU 

What is a disadvantage of using EIGRP automatic summarization? It creates inconsistent routing when the network has discontiguous networks.

What is the purpose of the EIGRP Null0 summary route? to prevent routing loops for destination networks which do not actually exist but are included in a summary route 

When would the network administrator use the ip bandwidth-percent eigrp as-number percent command? when there is a low bandwidth connection

What is an advantage of OSPF compared to RIP? fast convergence 

A router is running an EIGRP process and obtaining updates from other routers. What is an indication within the routing table that a route is a candidate for a default route? *

Two routers, R1 and R2, have established an EIGRP neighbor relationship, but there is still a connectivity problem. Which issue could be causing this problem?? an access list that is blocking advertisements from other networks

Which bandwidth value is used when calculating the EIGRP metric of a route? the slowest bandwidth of all outgoing interfaces between the source and destination 

Which routing protocol uses the Diffusing Update Algorithm to install routes into the routing table? EIGRP

used to confirm the reliable delivery of a packet. ACKNOWLEDGEMENT

OSPF features, Efficient Routing changes trigger routing updates (no periodic updates). It uses the SPF algorithm to choose the best path.

A network administrator is analyzing the differences between an EIGRP hold timer and EIGRP hello interval. What statement is valid about EIGRP hello and hold timers? EIGRP hello intervals should be less than or equal to EIGRP hold timers. 

The command clear ip ospf process forces a router with a new or changed router ID to form new adjacencies. 

hello used to form an EIGRP neighbor relationship 

Which operation feature is different between EIGRP and RIP? EIGRP stores all routes learned from neighbors in a topology table. 

A network administrator configures a loopback interface as the OSPF router ID with the IP address of 192.168.1.1/30. What could be the consequence of using this 30-bit mask for the loopback interface? This loopback interface may be advertised as a reachable network.

Speed of Convergence Routing protocols characteristic defines how quickly the routers in the network topology share routing information and reach a state of consistent knowledge. 

Which command will limit the bandwidth that is used by EIGRP process 1 to 20%? ip bandwidth-percent eigrp 1 20

Scalability Routing protocols characteristics defines how large a network can become, based on the routing protocol that is deployed.

What is the purpose of the EIGRP Null0 summary route? to prevent routing loops for destination networks which do not actually exist but are included in a summary route 

One of the four distance vector IPv4 IGPs refers as the First generation legacy protocol RIPv1 

The OSPF hello timer has been set to 15 seconds on a router in a point-to-point network. By default, what is the dead interval on this router? 60 seconds

Which algorithm is used by the OSPF routing process to construct the SPF tree on a router? Dijkstra's algorithm

Which interior routing protocol uses protocoldependent modules (PDMs)? EIGRP

The wildcard mask that is used to advertise exactly the network 192.168.160.0 with subnet mask 255.255.240.0 is 0.0.15.255

Which routing protocol uses the DUAL algorithm and sends multicast messages to propagate routing updates? EIGRP 

Implementation and Maintenance Routing protocols characteristics describes the level of knowledge that is required for a network administrator to implement and maintain the network based on the routing protocol deployed. 

Resource Usage Routing protocols characterisitics includes the requirements of a routing protocol such as memory space (RAM), CPU utilization, and link bandwidth utilization.

Which protocol number is used to indicate that an EIGRP packet is encapsulated in an IP packet? 88 

Which routing protocol uses the Diffusing Update Algorithm to install routes into the routing table? EIGRP