哪位大大能帮我做做这些CCNA的练习题啊。
If you perform a Boolean AND on the IP address 172.16.20.23 using the subnet mask of 255.255.248.0, which of the following is the subnetwork address?
a 172.16.0.0
b 172.16.16.0
c 172.16.20.0
d 172.16.20.16
e 172.16.24.0
2 Which of the following are valid hexadecimal numbers? (Choose three.)
a DEF3
b 1G45
c 1F35
d DH3F
e 453
f X35F
3 Convert the hexadecimal number 19 into its base 10 equivalent. Select the correct answer from the list below.
a 19
b 91
c 52
d 25
e 36
f 63
4 Which of the following describes a network interface card?
A large circuit board that contains sockets for expansion cards
B interface card capable of transferring more than one bit simultaneously and is used to connect external devices
C interface card inserted into a computer so that the computer can be connected to a network
iD nterface card that can be used for parallel communication in which only 1 bit is transmitted at a time
5 Convert the hexadecimal number CD into its base 10 equivalent. Select the correct answer from the list below.
A 197
B 199
C 201
D 203
E 205
F 207 6 Which specialized equipment is used to make a physical connection from a PC to a network? (Choose two.)
A router
B modem
C CD Rom
D network interface card
7 Which of the following will test the internal loopback of a node?
A ping 10.10.10.1
B ping 192.168.1.1
C ping 127.0.0.1
D ping 223.223.223.223
E ping 255.255.255.255
8 Which of the following interprets the data and displays the information in an understandable form for the user to see?
A application
B protocol stack
C remote devices
D logical connection
E physical connection
9 When purchasing a NIC for a computer, which of the following factors need to be considered? (Choose three.)
A protocols
b system bus
c brand of PC
d web browser
e type of media used on the network
10 Which of the following are considered to be "always on" services? (Choose two.)
a DSL
b ISDN
c 56kbps
d cable modem 11 Which statements best describe a physical connection? (Choose two.)
a internet standard is TCP/IP
b could utilize modem or NIC
c interprets data and displays information
d used to transfer data between PC and local network
12 Why were TCP/IP protocols developed?
a To insure that error correction of each packet takes place.
b To allow cooperating computers to share resources across a network.
c To allocate resources that are needed for operating a computer on a LAN.
d To determine the "best path" decision making when forwarding packets of data.
13 Which of the following are functions of a web browser without the addition of plug-ins? (Choose three.)
a updates IRQ's
b receives information
c requests information
d contacts web servers
e displays flash animation
f displays Quicktime movies
14 In an 8 bit binary number, what is the total number of combinations of the eight bits?
a 128
b 254
c 255
d 256
e 512
f 1024
15 Convert the decimal number 231 into its binary equivalent. Select the correct answer from the list below.
a 11110010
b 11011011
c 11110110
d 11100111
e 11100101
f 11101110
16 What are the requirements for an Internet connection? (Choose three.)
a remote host
b physical connection
c logical connection
d local connection
e application
17 Which of the following are popular web browsers? (Choose two.)
a Acrobat
b Internet Explorer
c Macromedia Flash
d Netscape Navigator
e Quicktime
f World Wide Web
18 What is the numeric base of hexadecimal numbers?
a Base 2
b Base 8
c Base 10
d Base 16
e Base 32
1 What is important to remember about the data link layer of the OSI model when considering Peer to Peer communication? (Choose three.)
a It links data to the transport layer.
b It encapsulates frames into packets.
c It provides a service to the network layer.
d It encapsulates the network layer information into a frame.
e Its header contains a physical address which is required to complete the data link functions.
f It encodes the data link frame into a pattern of 1s and 0s (bits) for transmission on the medium.
2 Which OSI and TCP/IP layer appears in both models yet has different functions in each?
a transport
b session
c application
d Internet
e physical
3 Which of the following are considered valid types of VPNs? (Choose three.)
a internal
b intranet
c external
d extranet
e local
f access
4 Which of the following topologies are considered logical topologies? (Choose two.)
a bus
b token-passing
c star
d mesh
e broadcast
f hierarchical
5 Which of the following are data link layer encapsulation details? (Choose two.)
a Packets are put into frames.
b Data is packaged into a packet.
c Data is segmented into segments.
d Data is converted for Internet travel.
e An address is added to identify the directly connected device.
6 Which of the following is the Layer 4 PDU?
a bit
b frame
c packet
d segment
7 Which of the following is the official name for the address assigned to each network interface card (NIC) by its manufacturer?
a NIC address
b MAC address
c IP address
d Source Address
8 Which of the following types of networks pass a token sequentially to each host? (Choose two.)
a Ethernet
b Token Ring
c FDDI
d Frame Relay
e ISDN
9 Which of the following are typical features that determine throughput? (Choose two.)
a types of passwords used on servers
b type of Layer 3 protocol used
c network topology
d length of the network cable
e number of users on the network
10 Which physical network topology uses a single backbone cable and connects all hosts directly to this cable?
a ring
b star
c bus
d mesh
11 Which device is used to connect LANs that are geographically separated?
a hub
b bridge
c router
d repeater
12 Which of the following describe a LAN? (Choose two.)
a operates within a limited geographical area
b provides dial-up connectivity
c uses serial interfaces to allow operation at lower speeds
d connects physically adjacent devices
e ensures single access to specialty hosts
13 Which of the following are ways that bandwidth is commonly measured? (Choose three.)
a GHzps
b kbps
c Mbps
d Nbps
e MHzps
f Gbps
14 During the data encapsulation process, how is the data broken down by the transport layer?
a packets
b segments
c data bits
d frames
15 Which protocols are commonly part of the application layer of the TCP/IP model? (Choose three.)
a FTP
b DNS
c UDP
d TCP
e HTTP
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