1). How long is an IPv6 address?
2). What flavor of Network Address Translation can be used to have one IP address allow many users to connect to the global Internet?
View AnswerPort Address Translation (PAT) allows a one-to-many approach to network address translation.
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3). What are the two main types of access control lists (ACLs)?
Standard
IEEE
Extended
Specialized
View AnswerStandard and extended access control lists (ACLs) are used to configure security on a router.
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4). What command is used to create a backup configuration?
View AnswerANS: B - copy running-config startup-config
The command to back up the configuration on a router is copy running-config startup-config .
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5). You have 10 users plugged into a hub running 10Mbps half-duplex. There is a server connected to the switch running 10Mbps half-duplex as well. How much bandwidth does each host have to the server?
View AnswerEach device has 10 Mbps to the server.
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6). Which WLAN IEEE specification allows up to 54Mbps at 2.4GHz?
View AnswerIEEE 802.11B is 2.4GHz, but with a maximum of only 11Mbps. IEEE 802.11G is in the 2.4GHz range, with a top speed of 54Mbps.
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7). Which of the following is the valid host range for the subnet on which the IP address 192.168.168.188 255.255.255.192 resides?
View AnswerANS: A - 192.168.168.129-190
256 - 192 = 64. 64 + 64 = 128. 128 + 64 = 192. The subnet is 128, the broadcast address is 191, and the valid host range is the numbers in between, or 129-190.
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8). To back up an IOS, what command will you use?
View AnswerThe command copy flash tftp will prompt you to back up an existing IOS in flash to a TFTP host.
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9). What protocol does PPP use to identify the Network layer protocol?
View AnswerNetwork Control Protocol is used to help identify the Network layer protocol used in the packet.
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10). Which of the following commands will allow you to set your Telnet password on a Cisco router?
View AnswerThe command line vty 0 4 places you in a prompt that will allow you to set or change your Telnet password.
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11). Which protocol does DHCP use at the Transport layer?
View AnswerUser Datagram Protocol is a connection network service at the Transport layer, and DHCP uses this connectionless service.
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12). Which command is used to determine if an IP access list is enabled on a particular interface?
View AnswerANS: C - show ip interface
The show ip interface command will show you if any outbound or inbound interfaces have an access list set.
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13). Where is a hub specified in the OSI model?
View AnswerHubs regenerate electrical signals, which are specified at the Physical layer.
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14). What does the passive command provide to dynamic routing protocols?
View AnswerANS: B - Stops an interface from sending periodic dynamic updates but not from receiving updates.
The passive command, short for passive-interface, stops regular updates from being sent out an interface. However, the interface can still receive updates.
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15). Which protocol is used to send a destination network unknown message back to originating hosts?
View AnswerICMP is the protocol at the Network layer that is used to send messages back to an originating router.
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16). How often are BPDUs sent from a layer 2 device?
View AnswerEvery 2 seconds, BPDUs are sent out from all active bridge ports by default.
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17). How many broadcast domains are created when you segment a network with a 12-port switch?
View AnswerBy default, switches break up collision domains but are one large broadcast domain.
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18). What does the command routerA(config)#line cons 0 allow you to perform next?
View AnswerANS: C - Set your console password.
The command line console 0 places you at a prompt where you can then set your console user-mode password.
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19). Which router command allows you to view the entire contents of all access lists?
View AnswerANS: B - show access-lists
To see the contents of all access lists, use the show access-lists command.
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20). Which class of IP address has the most host addresses available by default?
View AnswerClass A addressing provides 24 bits for host addressing.
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21). In a network with dozens of switches, how many root bridges would you have?
View AnswerYou should have only one root bridge per network.
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22). What PPP protocol provides dynamic addressing, authentication, and multilink?
View AnswerLink Control Protocol in the PPP stack provides dynamic addressing, authentication, and multilink.
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23). What is a stub network?
View AnswerANS: D - A network that has only one entry and exit point.
Stub networks have only one connection to an internetwork. Only default routes can be set on a stub network or network loops may occur.
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24). If your router is facilitating a CSU/DSU, which of the following commands do you need to use to provide the router with a 64000bps serial link?
View AnswerANS: D - RouterA(config-if)#clock rate 64000
The clock rate command is two words, and the speed of the line is in bps.
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25). Which one of the following is true regarding VLANs?
View AnswerANS: D - VTP is used to send VLAN information to switches in a configured VTP domain.
Switches do not propagate VLAN information by default; you must configure the VTP domain. VLAN Trunking Protocol (VTP) is used to propagate VLAN information across a trunk link.
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26). What does a VLAN do?
View AnswerANS: C - Breaks up broadcast domains in a layer 2 switch internetwork.
VLANs break up broadcast domains at layer 2.
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27). What is the main reason the OSI model was created?
View AnswerANS: C - So different networks could communicate.
The primary reason the OSI model was created was so that different networks could inter-operate.
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28). How many collision domains are created when you segment a network with a 12-port switch?
View AnswerLayer 2 switching creates individual collision domains.
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29). What command will display the line, protocol, DLCI, and LMI information of an interface? View AnswerThe show interface command shows the line, protocol, DLCI, and LMI information of an interface.
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30). Which protocol does Ping use?
View AnswerICMP is the protocol at the Network layer that is used to send echo requests and replies.
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31). Which command is used to upgrade an IOS on a Cisco router?
View AnswerThe copy tftp flash command places a new file in flash memory, which is the default location for the Cisco IOS in Cisco routers.
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32). If you wanted to delete the configuration stored in NVRAM, what would you type?
View AnswerThe command erase startup-config deletes the configuration stored in NVRAM.
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33). What protocols are used to configure trunking on a switch?
VLAN Trunking Protocol
VLAN
802.1Q
ISL
View AnswerVTP is not right because it has nothing to do with trunking except that it sends VLAN information across a trunk link. 802.1Q and ISL are used to configure trunking on a port.
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