分类： 系统运维
2007-03-09 16:51:35
41 Which of the following commands would not set a password on a Cisco router?
A. router(config)#enable secret
B. router(config-line)#password test
C. router(config)#service encryption password
D. router(config)#enable password
This command is used to encrypt passwords in configuration files.
42. Which of the following would cause a router to boot into the initial configuration dialog after powering has cycled?
A. Someone had copied the startup configuration file in a TFTP server
B. The running configuration file was copied to the startup configuration file
C. It is the first time router has ever been turned on
D. The write erase command was executed immediately before powering down the router.
These two scenarios describe what will happen when the router needs to use NVRAM to boot if it cannot find the configuration file.
43. What would cause a router to boot from ROM?
A. 0x3202
B. 0x2302
C. 0x2101
D. 0x2103
A configuration register of 1 or 0 will cause the router to boot from
44. Where does the running config file exist?
A. NVRAM
B. ROM
C. RAM
D. Flash
This file is erased if the router is reloaded or rebooted.
45. How do you back up a router?
A. router#copy running-config startup-configuration
B. router(config)#copy TFTP flash
C. router#copy flash TFTP
D. router#copy flash NVRAM
You can copy the file to a TFTP server or other storage device.
46. Which of the following is not valid?
A. router>show version
B. router#show running-config
C. router#show startup-config
D. router#show RAM
Answer D.
47. Which of the following are basic router functions?
A. Packet switching
B. Packet filtering
C. Path determination
D. Rapid convergence
Packets get switched once they are determined by the router where to go.
48. Which of the following is not an interior routing protocol?
A. RIP
B. IGRP
C. OSPF
D. BGP
BGP is an exterior routing protocol designed to communicate between autonomous systems
49. Which of the following routing protocols communicate router information by sending the state of it s links to all routers in it s domain?
A. BGP
B. RIP
C. IGRP
D. OSPF
This is a "link state" routing protocol. RIP and IGRP are distance vector, and BGP communicates reachability between domains.
50. What is a problem caused by distance vector routing protocols?
A. Split horizon
B. Route Poison
C. Counting to infinity
D. Max hop count
E. Hold down timers
Answers ABDE are counter measures to the counting to infinity problem caused by distance vector protocols.
51. What router command will display the routing protocol settings configured on a router?
A. show protocol
B. Show routing protocol
C.Show ip protocol
D. Show running-config
This also displays timers, neighbors, and next update info.
52. What helps mitigate the problems with link state protocols? Choose 2
A. Minimize router resource usage.
B. Coordinat, e updates
C. Minimum hop counts
D. Distance vectoring
53. Which router commands will enable RIP for 176.18.0.0? Choose 2
A. router rip
B. network 176.18.0.0
C. network rip
D. network rip 176.18.0.0
Router rip enables rip. Answer B enable the router to advertise to other routers that it is available. You must be in the global configuration prompt.
54. Which of the following is a disadvantage with the link state protocol? Choose 3
A. hold down counters
B. unsynchronized updates
C. high network bandwidth usage
D. high router resource usage
As link state packets flood the network, high network bandwidth can be a problem.
55. Which of the following exist at the application layer of the TCPIP model? Choose 3
A. SMTP
B. FTP
C. ICMP
D. RIP
E. IGRP
Answers D and E and routing protocols.
56. Which of the following translate Fully Qualified Domain Names into IP addresses?
A. Wins
B. DNS
C. SNMP
D. TCP
57. Which of the following translate netbios names?
A. Wins
B. DNS
C. SNMP
D. TCP
Netbios names are the names of the computers specified in the identification tab in the network neighborhood properties.
58. Which of the following is not done by TCP?
A. Subnetting
B. Error checking
C. Sequencing
D. Flow control
59. What does UDP and TCP have in common? Choose 2
A. flow control
B. error checking
C. checksum
D. provide destination and source port numbers
UDP doesn t check for errors.
60. Which of the following does the network layer do? Choose 2
A. Packet switching
B. Translating
C. Path determination
D. Convert signals to bits
61. Which of the following about ARP is true? Choose 2
A. It is in the application layer
B. It is in the network layer
C. It maps mac addresses to ip addresses
D. It maps ip addresses to mac addresses
At the same layer are RARP, ICMP, and IP. RARP does what is in answer C.
62. What protocol in the transport layer does not guarantee packet delivery?
A. TCP
B. IP
C. IPX
D. UDP
It does a best effort delivery, but is faster than TCP.
63. Which of the following is a class A ip address?
A.
B. 127.0.0.1
C. 172.15.42.34
D. 209.123.32.212
64. Which of the following is a class B address?
A.
B. 127.0.0.1
C. 172.15.42.34
D. 209.123.32.212
65. Which of the following is a loop back address?
A.
B. 127.0.0.1
C. 172.15.42.34
D. 209.123.32.212
This is used to test to see if IP is configured and working properly on your pc,
66. Which of the following is a non routable ip address? Choose 2
A.
B. 192.168.0.1
C. 10.14.12.12
D. 209.32.242
Answer A B. These are good ip addresses to use behind a fire wall because they will never be addresses that will be used on the internet.
67. Which of the following binary numbers represent
A. 00001010.00001100.00010000.00000110
B. 00011110.01010000.11001100.00110101
C. 01101010.11001010.01000101.01010011
D. 10001001.11010101.11111111.00000000
D cannot be used at all because you can t have all 1 s or 0 s
68. What does the process of AND in do?
A. It determines the value of an ip address
B. It determines the port that TCP will use
C. It determines if two ip addresses are on the same network
D. It decides the ip address subnet
You do this by writing out all the ip addresses in binary and match them against their subnets.After you match up the 1 s and 0 s you can decide if they are on the same network by seeing if all the numbers match. Check the test info page for an example.
69. Which of the following is a class C address?
A. 124.12.13.44
B. 210.24.56.76
C. 127.0.0.1
D.
An address above 191 for the first octet shows a class C address.
70. Of the following address address 11100000.11000000.11110000.10000000, what is true? Choose 2
A. It is a class C address
B. It has a host id of 192.224.128
C. It has a host id 128
D. It is a class B address.
71. Which layer is responsible for providing mechanisms for multiplexing upper-layer application, session establishment, and tear-down of virtual circuits?
A. Application
B. Presentation
C. Session
D. Transport
72. Which layer is responsible for coordinating communication between systems?
A. Application
B. Presentation
C. Session
D. Physical
73. Which layer is responsible for negotiating data transfer syntax?
A. application
B. presentation
C. session
D. transport
74. Which of the following is a characteristic of a switch, but not of a repeater?
A. Switches forward packets based on the IPX or IP address in the frame.
B. Switches forward packets based only on the IP address in the packet.
C. Switches forward packets based on the IP address in the frame
D. Switches forward packets based on the MAC address in the frame
Switches are network device that filters, forwards, and floods frames basedon the destination address of each frame. The switch operates at the data link layer of the OSI model. Switches use layer 2 addresses to filter the network
75. How does the cut-through switching technique work?
A. The LAN switch copies the entire frame into its buffers and then looks up the destination address in its forwarding, table and determines the outgoing interface
B. The switch waits only for the header to be received before it checks the destination address and starts forwarding the packets
C. By using broadcast addresses as source addresses
D. By using a Class II repeater in a collision domain
Packet switching approach that streams data through a switch so that the leading edge of a packet exits the switch at the output port before the packet finishes entering the input port. A device using cut-through packet switching reads, processes, and forwards packets as soon as the destination address is looked up, and the outgoing port determined. Also known as on-the-fly packet switching.
76. How do switches use store and forward?
A. The switch waits only for the header to be received before it checks the destination address and starts forwarding the packets
B. The LAN switch copies the entire frame into its buffers and then looks up the destination address in its forwarding, table and determines the outgoing interface
C. By using a class II repeater in a collision domain
D. By using broadcast addresses as source addresses
Packet-switching technique in which frames are completely processed before being forwarded out the appropriate port. This processing includes calculating the CRC and checking the destination address. In addition, frames must be temporarily stored until network resources (such as an unused link) are available to forward the message. Contrast with cut-through packet switching.
77. Choose all of the following that are needed to support full-duplex Ethernet.
A. Multiple paths between multiple stations on a link
B. Full-duplex NIC cards
C. Loop back and collision detection disabled
D. Automatic detection of full-duplex operation by all connected stations Capability for simultaneous data transmission between a sending station and a receiving station.
78. What two types of technology does 100BaseT use?
A. Switching with 53-byte cells
B. CSMA/CD
C. IEEE 802.5
D. 802.3u
100-Mbps baseband Fast Ethernet specification using UTP wiring. Like the 10BaseT technology on which it is based, 100BaseT sends link pulses over the network segment when no traffic is present. However, these link pulses contain more information than those used in 10BaseT. Based on the IEEE 802.3 standard.
79. Choose all of the following that are advantages to segmenting with routers.
A. Manageability
B. Flow control
C. Explicit packet lifetime control
D. Multiple active paths
All of the above is correct. A router is a Network layer device that uses one or more metrics to determine the optimal path along which network traffic should be forwarded. Routers forward packets from one network to another based on network layer information
