44. What OSI layer supports optional reliability? Transport.
45. You want the text, ‘You are connected’ to display when the command ‘show interface serial 0’
is entered. What command will enable this? description You are connected
46. Which command enables a display message when someone tries to log on to the router?
banner motd
47. What is the most effective solution to the distance-vector ‘count to infinity’ problem? Defining a
Maximum.
48. Image files like GIF, PICT, and JPEG are contained in what OSI layer? Presentation.
49. What protocols are included in the OSI Network layer? a. IP b. IPX c. AppleTalk d. DECnet
50. What command displays the current time on a router? show clock
51. What command enables NetWare frame type Ethernet_802.2? sap
52. What command displays Cisco Discovery Protocol adjacencies? show cdp neighbors
53. What TCP/IP address class is used for multicast? D.
54. What command-line keywords are valid when choosing Frame-Relay LMI types? a. q933a b.
cisco c. ansi
55. What command encrypts the enable password with strong encryption? enable secret
[password]
56. What technologies prevent network loops in a switched environment? Spanning Tree Protocol
and IEEE 802.ld.
57. How does flow control work? A station that is being overloaded with data tells the transmitting
station to stop until its buffer is clear.
58. At what point between the customer’s site and the phone carrier is responsibility transferred?
Demarc.
59. What command displays the encapsulation type of interface serial 0? show interface s0
60. What OSI layer controls end-to-end communication? Transport.
61. What are the five steps of data encapsulation? a. User information is converted into data b.
The data is converted into segments c. The segments are converted into datagrams and packets
d. The packers are put into logical frame e. The frames are put into bits
62. What protocol is the address ‘2b.0012.0c83.3879’ originated from? IPX.
63. What command would enable full duplex on the first port of the card in slot 3 on a Cisco
Catalyst 5000? set port duplex 3/1 full
64. What process uses LMI to resolve an IP address from a DLCI number? Inverse ARP.
65. Which of the following WAN components are not owned by the customer?
DTE
66. What command will display Ethernet 0’s IP address? show ip interface e0
67. Which of the following are contained in the OSI Application layer? Internet Browser* Video
Game* TCP LLC
68. What methods provide login access to a router? a. Aux b. Console c. Telnet d. HTTP
69. Given the IPX address 4adecn3n.0000.9a33.2643, what is the network portion of the
address? 4adecn3n.
70. What command will permit SMTP mail to only host 1.2.3.4? access-list 102 permit tcp any host
1.2.3.4 eq smtp
71. Packets are a concept tied to which OSI layer? Network.
72. What acronym is assigned to equipment located on the customer’s site? CPE (Customer
Premise Equipment).
73. What OSI layer allows Ethernet devices to identify one another at the Datalink layer? Datalink
– MAC Sublayer.
74. What command displays the IPX routing table? show ipx route
75. What global configuration command grants access to a serial interface on a 7500? int s 1/0/0
76. What features are common to ISDN BRI? a. Multiprotocol support b. SNMP MIB support c.
Call waiting d. Compression
77. What Ethernet operation type allows only one device to transmit at a time? Half-duplex.
78. What command line option determines what traffic is interesting enough for a dialup
connection? dialer-list
79. What global command loads an IOS file from FLASH memory on the next boot? boot system
flash [iosfilename]
80. What function is served by Autosense? It allows the router to determine which LMI type a
frame relay switch is using.
81. Which of the following operate in the OSI Physical layer? FDDI* Token Ring* SQL TCP FDDI*
82. When entering a command longer than one line, what character is used for delimiting? ‘#’
83. What command assigns and enables IPX on an interface? ipx network 4a
84. What command copies router configuration from NVRAM to a file server? copy startup-config
tftp
85. How does TCP provide flow control and error checking? Acknowledgements and windowing.
86. Using Cisco IOS, what PPP data compression methods can be used? Stacker and Predictor.
87. What command can verify Application layer connectivity? Telnet.
88. What command switches from User to Privileged mode? enable
89. What command will deny all telnet traffic from subnet 2.1.3.0? deny all telnet traffic from
2.1.3.0
90. Which of the following exist at the Transport Layer? LLC IP SQL UDP* ARP
91. What command line keyword matches Ethernet_SNAP? snap
92. Among the five classes of TCP/IP addresses, how many are available to the public? 3.
93. After entering the command ‘router igrp 50,’ what command enables IGRP on the router for
interace E1, with an address of 155.88.3.5 and a mask of 255.255.255.0? network 157.89.0.0
94. In what OSI layer do EBCDIC and ASCII exist? Presentation.
95. What command sets the clock rate to 64K on interface serial 2 while in interface configuration
mode? clock rate 64000
96. Describe the concept of Split Horizon. It is never useful to send the same routing update
packet back out the same interface that it was learned.
97. Given the command ‘ip route 1.1.1.1 255.255.255.255.0 1.2.1.2 12,’ what number accounts for
the administrative distance? 12.
98. Which of the following are complications of Distance-Vector routing? Routing loops*
Complexity of configuration Counting to infinity* Slow convergence* Periodic updates slow
convergence*
99. For less CPU strain, how should Cisco routers be configured for logging? Syslog server
routing.
100. What protocol uses connection-oriented updates? BGP uses TCP for reliable delivery.
101. Which of the following are Transport layer protocols? NBP* IP TCP* UDP* SPX*
102. When would the following day banner be displayed? ‘banner motd #’ ‘Howdy #’ Before login.
103. What command views router CPU utilization? show processes cpu
104. From a Windows 95 computer, what command will backup the IOS to the local drive using
tftp (provided you have a connection between the router and tftp-server)? copy flash tftp
105. What command format is used for configuring a port on a 7xxx Cisco router with a VIP card?
slot/port-adapter/port.
106. What command enables debugging of IPX RIP updates? debug ipx routing activity
107. What command enables frame relay on a router’s interface? encapsulation frame-relay
108. What range of IP numbers are available for extended TCP/IP access-lists? 100-199.
109. What command verifies Network layer connectivity between two hosts?
110. What does the parameter ‘log’ do on IPX access lists? It logs IPX access violations when
packets match particular access list entries.
111. What OSI layer controls conversation between applications? Session.
112. What function is served by the Datalink-LLC layer? It establishes media independence,
provides SAP’s, and provides flow control.
113. Bits are a concept essential to which OSI layer? Physical.
114. In what OSI layer does IP operate? Network.
115. Which TCP/IP class allows for the fewest valid Internet hosts? Class C.
116. What command sets encapsulation type to PPP? encapsulation ppp
117. What command starts a Cisco IOS file image upgrade? copy tftp flash
118. What command changes the CDP default interval? cdp timer 111
119. Which of the following are displayed by the command ‘show cdp neighbor detail’? Hostname*
Hardware type* Subnet mask Flash memory available Incoming/outgoing port*
120. What OSI model provides services to the Application layer via a Session layer connection?
Presentation.
121. What command loads the IOS from Read Only memory? boot system rom
122. How does Poison Reverse alert the network of an unavailable connected network? It sends a
special routing update packet which informs all connected routers that the distance to the dead
network is infinity.
123. Given the AppleTalk address ‘202.95’ what part it the node portion of the address? 95.
124. What PPP authentication types are supported by the Cisco IOS? PAP and CHAP.
125. What switching type varies latency through a switch? Store and Forward.
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