If delays are recorded as 10 bit numbers in a 50 router network, and delay vectors are exchanged twice a second, how much bandwidth per fill duplex line is occupied by the distributed routing algorithm?
A. 500 bps
B. 1500 bps
C. 5 bps
D. 1000 bps
E. None of the above
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HOSTS file entries are limited to how many characters?
A. 8
B. 255
C. 500
D. Unlimited
E. None of the above
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Demodulation is the process of
A. converting digital signals to analog signals
B. converting analog signals to digital signals
C. combining many low speed channels into one high speed channel
D. dividing the high-speed signals into frequency bands
E. None of the above
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Which of the following statement is incorrect?
A. The Addresses Resolution Protocol, ARP, allows a host to find the physical address of a target host on the same physical network, given only the target IP address.
B. The sender's IP - to- physical address binding is included in every ARP broadcast; receivers update the IP-to-Physical address binding information in their cache before processing an ARP packet.
C. ARP is a low-level protocol that hides the underlying network physical addressing, permitting us to assign IP-addresses of our choice to every machine.
D. All of the above
E. None of the above
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You are working with a network that has the network ID 192.168.10.0. What subnet should you use that supports up to 25 hosts and a maximum number of subnets?
A. 255.255.255.192
B. 255.255.255.224
C. 255.255.255.240
D. 255.255.255.248
E. 255.255.255.252
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Which of the following best illustrates the default subnet mask for a class A,B, and C Network?
A. 0.0.0.0, 0.0.0.1, 0.0.1.1
B. 255.255.255.0, 255.255.0.0, 255.0.0.0
C. 255.0.0.0, 255.255.0.0, 255.255.255.0
D. 255.255.0.0, 255.255.255.0, 255.255.255.255
E. None of the above
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Modulation is the process of
A. converting analog signals to digital signals
B. converting digital signals to analog signals
C. Multiplexing various signals into high speed line signals
D. performing data encryption.
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Devices interconnected by the LAN should include
A. Computers and terminals
B. mass storage device, printers and plotters
C. bridges and gateways
D. All of the above
E. None of the above
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What are the data transmission channels available for carrying data from one location to another?
A. Narrowband
B. Voiceband
C. Broadband
D. All of the above
E. None of the above
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On a class B network, how many hosts are available at each site with a subnet mask of 248?
A. 16,382
B. 8,190
C. 4,094
D. 2,046
E. 1,022
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Which of the following technique is used for encapsulation?
A. a technique used in best-effort delivery systems to avoid endlessly looping packets.
B. a technique used by protocols in which a lower level protocol accepts a message from a higher level protocol and places it in the data portion of the low level frame.
C. One of the pieces that results when an IP gateway divides an IP datagram into smaller pieces for transmission across a network that cannot handle the original datagram size
D. All of the above
E. None of the above
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You are working with three networks that have the network IDs 192.168.5.0, 192.168.6.0, and 192.168.7.0. What subnet mask can you use to combine these addresses into one?
A. 255.255.252.0
B. 225.255.254.0
C. 255.255.255.240
D. 255.255.255.252
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With an IP address set starting with 150, you currently have six offices that you are treating as subnets. Plans are in place to open 10 more offices before the end of the year. What subnet mask should you use to satisfy the needed number of subnets and maximize the number of hosts available at each site?
A. 192
B. 224
C. 240
D. 248
E. 252
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A machine that connects to two or more electronic mail systems and transfers mail messages among them is known as
A. Gateways
B. mail gateway
C. bridges
D. User Agent
E. None of the above
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If digital data rate of 9600 bps is encoded using 8-level phase shift keying (PSK) method, the modulation rate is
A. 1200 bands
B. 3200 bands
C. 4800 bands
D. 9600 bands
E. None of the above
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Error detection at a data link level is achieved by
A. bit stuffing
B. cyclic redundancy codes
C. Hamming codes
D. equalization
E. None of the above
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When the computer provides the manager with a multiple choice of possible answers, the prompting technique is
A. question and answer
B. form filling
C. open-ended question
D. menu selection
E. None of the above
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Which network topology is considered passive?
A. Cross
B. Ring
C. Star
D. Mesh
E. Bus
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If a firm wanted to transmit data from 1,000 punched cards to a remote computer, they would use a(n)
A. POS terminal
B. data collection terminal
C. batch processing terminal
D. intelligent terminal
E. None of the above
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Which address is the loopback address?
A. 0.0.0.1
B. 127.0.0.0
C. 127.0.0.1
D. 255.255.255.255
E. None of the above
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