Final Exam

1. Refer to the exhibit. The network has converged and Switch_6 has been elected root bridge of the STP tree. However, network traffic analysis indicates that Switch_1 would be a better root bridge. How can the network administrator make this change, assuming that the spanning-tree priorities are at the default settings?

Set the bridge priority of Switch_1 to 32,768.
Set the bridge priority of Switch_6 to 65,565.
***Set the bridge priority of Switch_1 to 1.
Set the bridge priority of Switch_6 to 255.

2. When should EIGRP automatic summarization be turned off?
when a router has not discovered a neighbor within three minutes
when a router has more than three active interfaces
***when a router has discontiguous networks attached
when a router has less than five active interfaces


3. Refer to the output in the exhibit. What can be determined from the information shown?
VTP has been enabled for all ports.
Hosts in VLAN11 and VLAN22 must have IP addresses in the same subnet in order for them to exchange data.
Three ports have been assigned to the management VLAN.
***ARP requests issued by the host on port Fa0/12 will be seen by all hosts on VLAN33.


4. Refer to the OSPF network in the exhibit. Router R2 has been elected DR, but router R1 is the more powerful router. How can the network administrator configure R1 to force it to be elected as DR?
R1(config)# ospf priority 1
R1(config)# ip ospf priority 255
R1(config)# interface fastethernet 0/0
R1(config-if)# ospf priority 0
R1(config)# interface fastethernet 0/0
R1(config-if)# ip ospf priority 0
***R1(config)# interface fastethernet 0/0
R1(config-if)# ip ospf priority 255

5. Which of the following are attributes of link-state routing protocols? (Choose three.)
Periodic updates are sent every 120 seconds to neighboring routers.
Each router sends its entire routing table to neighboring routers.
***Routers send updates when a change in the network is detected.
***Link-state protocols converge more rapidly than distance vector protocols.
After convergence, link-state protocols use more bandwidth than distance vector protocols use.
***Link-state protocols are less prone to routing loops than distance vector protocols.


6. Refer to the exhibit. What will be the result of DR elections in the OSPF network shown? (Choose three.)
***CTL will be DR of the 172.16.4.0/24 network.
ID3 will be DR of the 172.16.4.0/24 network.
***CTL will be DR of the 172.16.5.0/24 network.
ID1 will be DR of the 172.16.5.0/24 network.
***CTL will be DR of the 172.16.8.0/24 network.
ID2 will be DR of the 172.16.8.0/24 network.


7. The network administrator shown in the exhibit is connected to an Ethernet LAN port on ACC-1. The administrator needs to verify the configuration of the newly installed switch ACC-3. What must be done so that the administrator can access ACC-3 with a web browser? (Choose three.)
***Establish the Layer 3 connectivity of the host to ACC-3.
Set the password on the management VLAN.
Configure the hostname on ACC-3.
***Activate the HTTP service on ACC-3.
***Configure IP addressing parameters on ACC-3.

8. Which of the following tasks must be completed to configure a router interface to serve the newly added network 192.168.10.64/27 and to advertise this network over RIP v2? (Choose three.)
***RIP v2 must be configured with the network command and the IP network number for the new network.
RIP v2 must be configured with the network command and the IP host address and subnet mask for the newly activated interface.
The router must be configured with the ip subnet-zero command so that this network can be added and advertised.
***A network host address and subnet mask must be applied to the newly activated interface.
***The routing protocol must be activated with the router rip and version 2 commands.
RIP v2 must be configured on the other enterprise routers with an entry for the newly added network.

9. Multiple routers have been configured with EIGRP as the routing protocol for use in the corporate network. What is true of the operation of this network? (Choose three.)
Only link-state protocols will run in the network.
***Routing information in the form of partial updates will be sent in response to topology changes.
***The network can support multiple routed protocols.
***Hello packets are used to discover and verify the status of neighboring routers.
Routing updates are broadcast to all other routers in the network.
Routing updates that consist of entire routing tables are sent to neighboring routers.


10. Refer to the graphic. Which of the following commands would be used on the router to provide communication between the two hosts connected to the switch?
interface vlan 2
ip address 192.168.2.1 255.255.255.0
no shutdown
interface vlan 3
ip address 192.168.3.1 255.255.255.0
no shutdown
***interface fastethernet 0/0
no shutdown
interface fastethernet 0/0.2
encapsulation dot1q 2
ip address 192.168.2.1 255.255.255.0
interface fastethernet 0/0.3
encapsulation dot1q 3
ip address 192.168.3.1 255.255.255.0
interface vlan 2
switchport mode trunk dot1q
interface vlan 3
switchport mode trunk dot11
interface fastethernet 0/0
mode trunk dot1q 2 3
ip address 192.168.2.1 255.255.255.0


11. Refer to the exhibit. Two Catalyst switches are connected, and both switches have ports configured for the Sales and Marketing VLANs as shown. What will allow hosts on the same VLAN to communicate with one another across different switches?
STP
VTP
routing
***trunking


12. Refer to the exhibit. A company always uses the last valid IP address in a subnetwork as the IP address of the router LAN interface. A network administrator is using a laptop to configure switch SW-A with a default gateway. Assuming the switch IP address is 192.168.120.12/24, what command string will the administrator use to assign a default gateway to the switch?
SW-A(config)# ip gateway 192.168.120.1
SW-A(config)# ip route 0.0.0.0 0.0.0.0 192.168.120.255
SW-A(config)# ip route 192.168.120.254 255.255.255.0 fastethernet 0/0
SW-A(config)# ip default-route 192.168.120.254
***SW-A(config)# ip default-gateway 192.168.120.254

13. What is the first step in the spanning-tree process?
elect a designated switch
use a router to locate a default gateway
***elect a root bridge
determine the path cost of each active port on the switch

14. What is the first parameter used to determine which switch is selected as the root bridge in a spanning-tree network?
highest path cost
highest priority number
highest Layer 2 address
***lowest priority number
lowest path cost
lowest Layer 2 address


15. Refer to the exhibit. What is the meaning of the highlighted value of 64 shown in the routing table?
It is the administrative distance.
It is the value assigned by the Dijkstra algorithm that designates how many hops are in the network.
It is the value used by the DUAL algorithm to determine the bandwidth for the link.
***It is the metric, which is cost.


16. A new switch has been added to the network and it needs to support error-free switching. Which switching mode should be configured on the new switch?
cut-through
fragment-free
***store and forward
auto-sensing


17. Refer to the exhibit. What is the most efficient summarization of the routes attached to router R1?
198.18.0.0/16
***198.18.48.0/21
198.18.32.0/22
198.18.48.0/23
198.18.49.0/23
198.18.52.0/22

18. A network administrator asked an assistant to remove several VLANs from a switch. When the assistant entered in the no vlan 1 command an error was received. What was the cause of the error?
VLANs can not be deleted until all ports have been removed from the VLAN assignment.
VLANs can only be deleted by the user that created them.
VLAN 1 can not be deleted until another VLAN has been assigned its duties.
***VLAN1 is the management VLAN by default and can not be deleted.
The command was not entered properly, which caused a syntax error to occur.


19. Refer to the exhibit. How many broadcast domains are there in the topology shown, assuming that VLANs are not configured on the switches?
one
***two
three
four
six
eight

20. What are two of the benefits that switches provide to a network without VLANs configured? (Choose two.)
They allow creation of permanent virtual circuits.
They decrease network throughput.
They shrink the size of broadcast domains.
***They help eliminate collision domains.
***They allow existing bandwidth to be more efficiently utilized.


21. Refer to the network and command output shown in the exhibit. A network administrator located at the Headquarters site needs to check the configuration of a switch located at the Pacific office. Which command can be used to gain remote access to the Pacific LAN switch, assuming the switch is assigned the IP address 198.19.27.251/24?
Headquarters# telnet Pacific
Headquarters# dial Pacific 198.19.27.251
Headquarters(config)# line vty 0 4
Headquarters(config-line)# telnet Pacific
***Headquarters# telnet 198.19.27.251

22. Which three statements describe full-duplex Ethernet? (Choose three.)
***It utilizes 100% of the bandwidth in both directions.
It requires two wires.
It increases the number of broadcast domains in the network.
***It allows data to be received and sent simultaneously.
***It reduces the number of collisions.
It provides between 60% and 80% of the bandwidth in both directions.

23. The following command was added to a router configuration:

ip route 172.26.153.0 255.255.255.0 198.19.27.249

What two effects will this command have? (Choose two.)
It will create a default route using the interface with the IP address 198.19.27.249 as the next hop.
The route will be marked with an "C" in the routing table.
***It will create a static route to the 172.26.153.0/24 network.
All packets with an unknown destination address will be forwarded to the 172.26.153.0/24 network.
***Routes to network 172.26.153.0 that are learned dynamically will not be used to route packets as long as this configuration command is in effect.


24. Refer to the exhibit. Each switch is shown with its MAC address. Which switch will be elected as the spanning-tree root bridge, if the switches are configured with their default priority values?
Switch_1
Switch_2
Switch_3
Switch_4
***Switch_5
Switch_6


25. Refer to the exhibit. Which configuration commands will direct outbound traffic from Corp_1 to the ISP and inbound traffic from the ISP to network 192.168.1.0/24?
***Corp_1(config)# ip route 0.0.0.0 0.0.0.0 serial 0/0
ISP(config)# ip route 192.168.1.0 255.255.255.0 serial 0/1
Corp_1(config)# ip route 198.19.27.0 255.255.255.0 serial 0/0
ISP(config)# ip route 0.0.0.0 0.0.0.0 serial 0/1
Corp_1(config)# ip route 0.0.0.0 0.0.0.0 serial 0/0
ISP(config)# ip route 0.0.0.0 0.0.0.0 serial 0/0
Corp_1(config)# ip route 198.19.27.0 255.255.255.0 serial 0/0
ISP(config)# ip route 192.168.1.0 255.255.255.0 serial 0/1


26. Refer to the exhibit. What is the correct OSPF configuration for router RT-1?
RT-1(config)# router ospf 1
RT-1(config-router)# network 172.16.21.0 0.0.0.63 area 0
RT-1(config-router)# network 172.16.21.248 0.0.0.3 area 0
RT-1(config)# router ospf 0
RT-1(config-router)# network 172.16.21.0 0.0.0.3 area 0
RT-1(config-router)# network 172.16.21.248 0.0.0.31 area 0
***RT-1(config)# router ospf 1
RT-1(config-router)# network 172.16.21.0 0.0.0.31 area 0
RT-1(config-router)# network 172.16.21.248 0.0.0.3 area 0
RT-1(config)# router ospf 99
RT-1(config-router)# network 172.16.21.0 255.255.255.224 area 0
RT-1(config-router)# network 172.16.21.248 255.255.255.248 area 0


27. Refer to the exhibit. Router LC-1 needs to be configured to provide communication between the networks shown. Which group of commands will configure EIGRP on LC-1 to work within this network?
LC-1(config)# router eigrp 1
LC-1(config-router)# network 192.168.43.0 0.0.0.3 area 0
LC-1(config-router)# network 192.168.43.4 0.0.0.3 area 0
LC-1(config-router)# network 192.168.43.128 0.0.0.63 area 0
LC-1(config)# router eigrp 1
LC-1(config-router)# network 192.168.43.0 0.0.0.3 no-summary
LC-1(config-router)# network 192.168.43.4 0.0.0.3 no-summary
LC-1(config-router)# network 192.168.43.128 0.0.0.192 no-summary
***LC-1(config)# router eigrp 1
LC-1(config-router)# network 192.168.43.0
LC-1(config)# router eigrp 1
LC-1(config-router)# network 192.168.43.0 0.0.0.3
LC-1(config-router)# network 192.168.43.4 0.0.0.3
LC-1(config-router)# network 192.168.43.128 0.0.0.192

28. Employees of XYZ Company connect their laptop computers to the office LAN using Ethernet ports. The Cisco switches used in the company network are configured with port security. At which layer of the three-layer design model do these switches operate?
physical
distribution
data link
***access
core



29. Refer to the graphic. Switch 2 has computers attached that belong to VLAN 2. Switch 3 has computers attached that belong to VLAN 3. Switch 1 is a Cisco 2926G Layer 3 switch that has a route module installed. Switch 1 provides connectivity to the other switches and is used to route between the VLANs. At which layer of the three-layer switch design model does Switch 1 operate?
physical
data link
core
access
network
***distribution


30. Performance of the network shown in the exhibit has become poor since the addition of hosts to the network. The network administrator suspects that excessive collisions are causing this problem. If the network is using hubs, what should be done to reduce the collisions?
Add a router to every hub segment.
Replace hubs with access points.
***Replace hubs with switches.
Add additional hubs.