Connecting Networks Version 6 – CN Chapter 2 Exam

Connecting Networks (Version 6.00) – CN Chapter 2 Exam

QUESTION 1

How does implementing STP allow for a scalable network design?

It prevents local traffic from propagating to other parts of the network.
It eliminates Layer 2 loops from redundant links.*
It filters broadcasts and other undesirable traffic from the network.
It provides failover services when duplicate network equipment is used.

Spanning Tree Protocol (STP) supports the design of a scalable network by preventing Layer 2 loops where redundant switch paths are implemented.

QUESTION 2

Refer to the exhibit. Which address will R1 use as the source address for all OSPFv3 messages that will be sent to neighbors?

FF02::5

FE80::1*

2001:DB8:ACAD:A::1

FF02::1

All OSPFv3 messages are sourced from the link-local IPv6 address of an interface. Link local addresses use the prefix FE80::/10.

QUESTION 3

Which wildcard mask would be used to advertise the 192.168.5.96/27 network as part of an OSPF configuration?0.0.0.32

0.0.0.31*

255.255.255.224

255.255.255.223

The wildcard mask can be found by subtracting the subnet mask from 255.255.255.255.

QUESTION 4

Refer to the exhibit. A network administrator has configured OSPFv2 on the two Cisco routers as shown. The routers are unable to form a neighbor adjacency. What should be done to fix the problem?

Add the command network 192.168.30.0 0.0.0.255 area 0 on router R1.

Change the IP address on S0/0 of router R2 to 192.168.20.2.*

Remove the FastEthernet0/0 passive interface configuration on router R1.

Add the command network 192.168.20.1 0.0.0.0 area 0 on router R1.

In order to form OSPFv2 neighbor adjacencies, two connected router interfaces must share the same subnet. Router R2 is shown in the topology with an IP address of 192.168.20.5 and does not exist on the same subnet as the 192.168.20.1 /30 IP address of S0/0 on router R1.

QUESTION 5

What is one reason to use the ip ospf priority command when the OSPF routing protocol is in use?

to activate the OSPF neighboring process

to streamline and speed up the convergence process

to influence the DR/BDR election process*

to provide a backdoor for connectivity during the convergence process

The OSPF priority can be set to a number between 0 and 255. The higher the number set, the more likely the router becomes the DR. A priority 0 stops a router from participating in the election process and the router does not become a DR or a BDR.

QUESTION 6

Refer to the exhibit. A Layer 3 switch routes for three VLANs and connects to a router for Internet connectivity. Which two configurations would be applied to the switch? (Choose two.)

(config)# ip routing*

(config)# interface fastethernet0/4
(config-if)# switchport mode trunk

(config)# interface vlan 1
(config-if)# ip address 192.168.1.2 255.255.255.0
(config-if)# no shutdown

(config)# interface gigabitethernet 1/1
(config-if)# no switchport
(config-if)# ip address 192.168.1.2 255.255.255.252*

(config)# interface gigabitethernet1/1
(config-if)# switchport mode trunk

The no switchport command allows a switch port to be assigned an IP address. The port is a routed port at that point. The ip routing command enables routing for a switch. Use the interface vlan x command on the switch to configure routing for any VLAN that is attached to the switch, including the management VLAN. No management VLAN is shown in this scenario, but the commands interface vlan 5 and interface vlan 6, along with an appropriate IP address and subnet mask for each VLAN, would be used on the switch in the exhibit. There is no need to add an IP address or use the no shutdown command on VLAN 1 because VLAN 1 is not used in this design and because VLAN 1 is “up and up” by default.

QUESTION 7

Refer to the exhibit. A network administrator has issued the show ip eigrp neighbors command. What can be concluded from the output?

An EIGRP neighbor with IP address 10.10.10.14 is connected to R1 via serial interface 0/1/0.

There is no incoming EIGRP message at this moment.

The first EIGRP neighbor R1 learned about has the IP address 10.10.10.2.*

If R1 does not receive a Hello packet in 4 seconds from the neighbor with IP 10.10.10.18, it will declare the neighbor is down.

With the show ip eigrp neighbors command, the output includes:
H column – Lists the neighbors in the order that they were learned.
Address – IPv4 address of the neighbor.
Interface – Local interface on which this Hello packet was received.
Hold – Current hold time. When a Hello packet is received, this value is reset to the maximum hold time for that interface, and then counts down to zero. If zero is reached, the neighbor is considered down.
Queue Count – Should always be zero. If more than zero, then EIGRP packets wait to be sent.
In the output shown, the neighbor router with IP 10.10.10.2 was the first neighbor learned by router R1.

QUESTION 8

Refer to the exhibit. Which command will configure unequal-cost load balancing with EIGRP on the HQ router?maximum-paths 1

maximum-paths 2

variance 2*

variance 1

The maximum-paths command is used to configure equal-cost load balancing with EIGRP. The variance command is used to configure unequal-cost load balancing, but the default variance is 1. If the variance is set to 1, only routes with the same metric as the successor are installed in the local routing table. So, to configure unequal-cost load balancing, the variance 2 command should be used.

QUESTION 9

Refer to the exhibit. Based on the command output shown, what is the status of the EtherChannel?

The EtherChannel is down as evidenced by the protocol field being empty.

The EtherChannel is in use and functional as indicated by the SU and P flags in the command output.*

The EtherChannel is partially functional as indicated by the P flags for the FastEthernet ports.

The EtherChannel is dynamic and is using ports Fa0/10 and Fa0/11 as passive ports.

The command output shows the port channel as SU, which means Layer 2 and in use; and the FastEthernet 0/10 and 0/11 interfaces are bundled in port-channel as indicated by the P flag. Configuring the EtherChannel using the channel-group 1 mode on command will cause the Protocol field in the command output to be empty.

QUESTION 10

Which function is provided by EtherChannel?enabling traffic from multiple VLANs to travel over a single Layer 2 link

creating one logical link by using multiple physical links between two LAN switches*

dividing the bandwidth of a single link into separate time slots

spreading traffic across multiple physical WAN links

EtherChannel technology allows the grouping, or aggregating, of several Fast Ethernet or Gigabit switch ports into one logical channel.

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