1.How many root bridges are in a large switch backbone with 10 VLANs and 10switches?
A) 10
B) 100
C) 1,000
D) 1
2.When a layer 2 switch receives a broadcast from VLAN 1, what does the switchdo with the frame?
A) Sends the frame out all ports in VLANs 1 through 1005
B) Sends the broadcast from the port it was received on
C) Sends the frame out all ports configured in VLAN 1 except the sourceport
D) Sends the frame out all ports regardless of VLAN membershipCorrect
Answer(s): C) Sends the frame out all ports configured in VLAN 1 except the sourceport
Explanation: The correct answer is c. A layer 2 switch configured with a number of VLANswill not send a broadcast from one VLAN to another because they aredifferent broadcast domains. This is the main purpose of a layer 2 switch-tosegregate Ethernet or Token Ring networks, for instance. Answer a isincorrect, because a switch will not broadcast all frames to all VLANs.
Answer b is incorrect, because a switch will not send out a broadcast to thesource port, but all ports in the same VLAN. Answer d is incorrect, becausea switch will not send a broadcast regardless of VLAN membership. The onlytime this is not the case is when 802.1q encapsulation is configured, inwhich case broadcasts are sent across the trunks tagged with VLANinformation.
3.Which IOS command will copy the NVRAM to the running configuration located
in RAM?
A) copy startup-config running-config
B) show running-config copy
C) write config
D) copy tftp configuration
4.Which Exec mode command will display a Cisco router's hardware components?
A) show components
B) display hardware
C) show hard
D) list hardware
Correct Answer(s): C) show hard
Explanation:
The correct answer is c. The IOS command to display the hardware components on a Cisco router is show hardware or shorthand show hard or show ha. Answers a, b, and d are incorrect, because show components, display hardware, and list hardware are invalid IOS commands.
5.Which of the following is the correct set of commands to configure a subinterface to use IPX?
A) config t, int e 0, ipx network encap sap
B) config t, int e 0.1, ip network 70 encapsulation sap
C) config terminal, interface e 0.1, ipx network 70 encapsulation sap
D) config terminal, interface e 0.1, ip network 70 encapsulation sap
6.Which commands will display the IPX address on interface ethernet 1? (Choose the three best answers)
A) sh ipx int
B) ipx int
C) sh int e 1
D) sh ipx int ethernet 1
E) sh ipx address
F) sh ipx ethernet address
G) display ipx interface ethernet
Correct Answer(s):
A) sh ipx int
C) sh int e 1
D) sh ipx int ethernet 1
Explanation:
a, c, d. Any IOS command that displays information about an interface will display network address information. The commands show ipx interface as well as show interface are used to display information about all of the router interfaces. Both of these commands can be used to display information about a specific interface by adding the interface name to the end of the command, as shown in answers c and d. Answers b, e, f, and g use incorrect IOS commands or syntax.vided therein
7.Which Exec mode command will display a Cisco router's hardware components?
A) show components
B) display hardware
C) show hard
D) list hardware
8.What is the main difference between RIP and OSPF?
A) There is no difference; both are routing protocols for IP.
B) RIP is a link-state protocol, and OSPF is a distance-vector protocol.
C) RIP converges faster than OSPF.
D) OSPF is a link-state protocol and converges much faster than RIP, whichis a distance-vector protocol.
Correct Answer(s):
D) OSPF is a link-state protocol and converges much faster than RIP, which is a distance-vector protocol.
Explanation:
The correct answer is d. OSPF is a link-state protocol, and RIP is a distance-vector protocol. Link-state protocols converge faster than distance-vector protocols. Answer a is incorrect, because there are major differences between link-state and distance-vector protocols, such as speed, VLSM, and CPU requirements. Answer b is incorrect, because RIP is a distance-vector protocol, not a link-state protocol. Answer c is incorrect, because RIP converges considerably slower than OSPF.9.Which commands will display the IPX address on interface ethernet 1? (Choose the three best answers)
A) sh ipx int
B) ipx int
C) sh int e 1
D) sh ipx int ethernet 1
E) sh ipx address
F) sh ipx ethernet address
G) display ipx interface ethernet
10.What usually determines the IPX node address?
A) The network administrator
B) The physical address of the device
C) The IP address of the device
D) The last 3 bytes of the IPX address
Correct Answer(s):
B) The physical address of the device
Explanation:
The correct answer is b. Answer a is incorrect because the network administrator usually determines only the IPX network address. Answers c and d are incorrect because the IPX node address is usually the same as the physical 6-byte MAC address of a device.
11.What is the main difference between RIP and OSPF?
A) There is no difference; both are routing protocols for IP.
B) RIP is a link-state protocol, and OSPF is a distance-vector protocol.
C) RIP converges faster than OSPF.
D) OSPF is a link-state protocol and converges much faster than RIP, which is a distance-vector protocol.
12.What is the maximum number of hosts that can be assigned using a 30-bit mask?
A) 255
B) 250
C) 512
D) 2
Correct Answer(s):
D) 2
Explanation:
The correct answer is d. A 30-bit mask is represented in decimal as 255.255.255.252 as is typically used on Serial links between Cisco routers. This leaves 2 bits available for host addressing. Let's do the math, a simple calculation of 22=4-2=2. Answers a, b, and c are incorrect, because the maximum number of hosts that can be assigned to a 30-bit network is 2.
13.Which of the following commands displays the complete IPX address of a single interface?A) sh ipx int serial
B) sh ipx int e 0
C) sh int ipx e 0
D) sh ipx s 0
14.Which device eliminates broadcast storms?
A) Switch
B) Bridge
C) Hub
D) Router
Correct Answer(s):
D) Router
Explanation:
The correct answer is d. Answer a is incorrect because switches can limit broadcasts to specific VLANs, but only routers can eliminate broadcast storms. Answers b and c are incorrect because bridges and hubs pass broadcasts to all connected segments.
15.What is the purpose of the Spanning Tree algorithm?
A) Keeps routing updates from being transmitted onto the same port on which they were received
B) Prevents routing loops
C) Determines loop-free topologies and provides, when possible, paths between every pair of LANs
D) Discovers remote routers running CDP
16.What does the passive-interface command accomplish?
A) Not a valid command
B) Stops a Cisco router from receiving routing updates
C) Stops a Cisco router sending or receiving routing routes
D) Prevents a router from advertising networks through the outbound interface only
Correct Answer(s):
D) Prevents a router from advertising networks through the outbound
interface only
Explanation:
The correct answer is d. The passive-interface command is used under the IP routing protocols configuration. When applied, this command will prevent a Cisco router from sending updates on the outbound interface. Answer a is incorrect, because the command passive-interface is a valid IOS command. Answer b is incorrect, because a Cisco router will add networks that are received on an inbound interface. Answer c is incorrect, because only outbound updates will be prevented from being sent; incoming routing updates are processed and inserted into the IP routing table accordingly.
17.Which device eliminates broadcast storms?
A) Switch
B) Bridge
C) Hub
D) Router
18.What is contained in a data frame?
A) Source MAC address
B) Destination physical address
C) Data
D) All of the above
Correct Answer(s):
D) All of the above
Explanation:
The correct answer is d. A data frame contains the physical MAC address of the source and destination computers as well as data. Don't confuse physical addresses and MAC addresses--they are the same.
19.What does the passive-interface command accomplish?
A) Not a valid command
B) Stops a Cisco router from receiving routing updates
C) Stops a Cisco router sending or receiving routing routes
D) Prevents a router from advertising networks through the outbound
interface only
20.Suppose a Cisco router has several paths to a remote network using RIP, IGRP, EIGRP, and OSPF. What path will the router choose?
A) RIP
B) IGRP
C) EIGRP
D) OSPF
Correct Answer(s):
C) EIGRP
Explanation:
The correct answer is c. Cisco routers have a predefined administrative distance (AD) that defines the trustworthiness of routing protocols. The AD value ranges from 0 through 255. The lower the AD, the more trusted the network routing information. Table 12.1 provides the default AD values assigned by Cisco IOS. EIGRP (90) will be selected over RIP (120), IGRP (100), and OSPF (110), because EIGRP's administrative distance is the lowest among all answers. Answers a, b, and d are incorrect, because RIP, IGRP, and OSPF have higher AD values than EIGRP.
21.What is contained in a data frame?
A) Source MAC address
B) Destination physical address
C) Data
D) All of the above
22.Which type of data transmission sends one packet to every device on a
segment?
A) Broadcast
B) Multicast
C) Unicast
D) Telecast
Correct Answer(s):
A) Broadcast
Explanation:
The correct answer is a. A broadcast is a data transmission to every device on the segment. Answers b and c are incorrect because a multicast is a data transmission to multiple devices on the subnet, and a unicast is a directed data transmission to a single network device on the subnet. Answer d is not a data networking term.
23.Which type of data transmission sends one packet to every device on a segment?
A) Broadcast
B) Multicast
C) Unicast
D) Telecast
24.Dial-on-Demand Routing is usually associated with which of the following? (Choose the three best answers)
A) ISDN
B) Modems
C) Terminal adapters
D) None of the above
Correct Answer(s):
A) ISDN
B) Modems
C) Terminal adapters
Explanation:
a, b, c. Dial-on-Demand Routing usually requires an ISDN terminal adapter or a modem and the right type of phone line.24.What are the four states in Spanning Tree bridging?
A) Listening, learning, blocking, ending
B) Learning, forwarding, resetting, flooding
C) Broadcasting, learning, forwarding, listening
D) Listening, forwarding, blocking, learning
25.A Cisco router administrator enables an Ethernet interface on a Cisco router with no physical cable connection or 10BaseT hub on the interface. The keepalive 0 command was entered in interface mode. What will happen when the no shutdown command is issued while in interface mode?
A) The router will reload.
B) The interface will be shut down automatically by the IOS.
C) The interface line protocol will be down.
D) The interface line protocol will be up.
Correct Answer(s):
D) The interface line protocol will be up.
Explanation:
The correct answer is d. The keepalive command sets the interval at which an Ethernet interface will check the status of the link. Setting keepalive to 0 means a Cisco router will assume the interface is always active and the protocol is up. Answer a is incorrect, because the router will only reload with a power reset or with the reload command. Answer b is incorrect, because the IOS will not shut down an interface unless instructed with the shutdown command in interface mode. Answer c is incorrect; the router will activate the interface but it will not be able to communicate to any devices, because, physically, the interface is not connected to any other LAN segment.
26.Dial-on-Demand Routing is usually associated with which of the following? (Choose the three best answers)
A) ISDN
B) Modems
C) Terminal adapters
D) None of the above.
27.You have been assigned the IP address of 211.242.15.0, subnet mask255.255.255.248 for your network. Which of the following addresses are validhost addresses?
(Choose the three best answers)
A) 211.42.15.16
B) 211.42.15.17
C) 211.42.15.18
D) 211.42.15.19 E) 211.42.15.31
Correct Answer(s):B) 211.42.15.17
C) 211.42.15.18
D) 211.42.15.19
Explanation: b, c, d. The subnet addresses are all in multiples of 8. The valid host IDsinclude 211.42.15.17, 211.42.15.18 and 211.42.15.19. All of these addressesare members of the .16 subnet. 211.42.15.16 is a subnet address.211.42.15.31 is a broadcast address for the .24 subnet.
28.A Cisco router administrator enables an Ethernet interface on a Cisco router with no physical cable connection or 10BaseT hub on the interface. The keepalive 0 command was entered in interface mode. What will happen when the no shutdown command is issued while in interface mode?
A) The router will reload.
B) The interface will be shut down automatically by the IOS.
C) The interface line protocol will be down.
D) The interface line protocol will be up.
29.Which of the following statements are true regarding the register 0x2142
configuration? [Choose the three best answers]
A) The router will boot from flash.
B) The router will boot from ROM.
C) The router will ignore the configuration in NVRAM.
D) The router will boot the configuration NVRAM into RAM.
E) The console baud rate is 9600.
Correct Answer(s):
A) The router will boot from flash.
C) The router will ignore the configuration in NVRAM.
E) The console baud rate is 9600.Explanation:
The correct answers are a, c, and e. The register 0x2142 configuration is a common register you should be aware of. By examining the bits shown in Chapter 11, you can deduce that the router will ignore the startup configuration in NVRAM (bit 6 is set to 1) and the baud rate (bits 11/12) is set to 9600. This register will also cause the router to boot from flash (bits 0 through 3). Answer b is incorrect, because the router will only boot from ROM if the first three bits are set to 000. Answer d is incorrect, because the register 0x2142 instructs the router to ignore the configuration in NVRAM.
-29.You have been assigned the IP address of 211.242.15.0, subnet mask255.255.255.248 for your network. Which of the following addresses are validhost addresses?(Choose the three best answers)
A) 211.42.15.16
B) 211.42.15.17
C) 211.42.15.18
D) 211.42.15.19
E) 211.42.15.3130.
30.Which of the following will the show version command display?
(Choose thefour best answers)A) System hardware
B) Static routes configuration
C) Names and location of the configuration files
D) Boot images
E) Software version
Correct Answer(s):
A) System hardware
C) Names and location of the configuration files
D) Boot images
E) Software versionExplanation: 30.a, c, d, e. Use the show version command to display the system hardware,names, and locations of the configuration files, boot images, and thesoftware version. The command show IP route will give you routing tableinformation.
31.Which of the following statements are true regarding the register 0x2142 configuration? [Choose the three best answers]
A) The router will boot from flash.
B) The router will boot from ROM.
C) The router will ignore the configuration in NVRAM.
D) The router will boot the configuration NVRAM into RAM.
E) The console baud rate is 9600.32.How many root bridges are in a large switch backbone with 10 VLANs and 10
switches?A) 10
B) 100
C) 1,000
D) 1Correct Answer(s):
A) 10
Explanation:
The correct answer is a. Every VLAN in any layer 2-switched environment will have one root bridge per VLAN. Because there are 10 VLANs, there will be 10 root bridges-one per VLAN (10?1=10). Each VLAN is treated like a separate bridge environment. Answers b, c, and d are incorrect, because the correct answer to the question is 10 root bridges.
33.Which of the following will the show version command display? (Choose the four best answers)
A) System hardware
B) Static routes configuration
C) Names and location of the configuration files
D) Boot images
E) Software version34.Which of the following statements about passwords on Cisco routers are true? (Choose the three best answers)
A) Passwords are not case-sensitive.
B) Passwords are case-sensitive.
C) Passwords can be set on the individual interfaces.
D) Passwords can only be set to specify case-sensitive or not case-sensitive in the privileged EXEC mode.
E) Passwords can be set on the privileged EXEC mode.Correct Answer(s):
B) Passwords are case-sensitive.
C) Passwords can be set on the individual interfaces.
E) Passwords can be set on the privileged EXEC mode.Explanation:
b, c, e. Passwords are case-sensitive and can be set on the individual interfaces and on the privileged EXEC mode. The IOS doesn't support setting case-sensitive or not case-sensitive.
