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Q1: A station in a network forwards incoming packets by placing them on its shortest output queue. What routing algorithm is being used?
flooding
delta routing
hot potato routing
static routing
Q2: What are the most commonly used transmission speeds in BPS used in data communication?
300
1200
2400
9600
Q3: “When you ping the loopback address, a packet is sent where?”
Across the wire
On the network
Down through the layers of the IP architecture and then up the layers again
through the loopback dongle
Q4: “A devices that links two homogeneous packet-broadcast local networks, is”
repeater
gateway
bridge
hub
Q5: The first step in troubleshooting many problems is to verify which of the following?
The subnet mask is valid
The BDC is operable
TCP/IP is installed correctly on the client+
The WINS server is running
Q6: “Usually, it takes 10-bits to represent one character. How many characters can be transmitted at a speed of 1200 BPS?”
120
10
1200
12
Q7: Which of the following TCP/IP protocol allows an application program on one machine to send a datagram to an application program on another machine?
SMTP
UDP
X.25
VMTP
Q8: Communication network is
a continuous frequency capable of being modulated or impressed with a second signal
a collection of interconnected functional units that provides a data communications service among stations attached to the network[Ans]
one or more conductors that serve as a common connection for a related group of devices
the condition with two or more stations attempt to use the same channel at the same time
Q9: What device separates a single network into two segments but lets the two segments appear as one to higher protocols?
Gateway
Router
Switch
Bridge+
Q10: Which of the following condition is used to transmit two packets over a medium at the same time?
Synchronous
Asynchronous
Contention
Collision
Q11: How many digits of the DNIC (Data Network Identification Code) identify the country?
first three+
first five
first six
first four
Q12: The slowest transmission speeds are those of
microwaves
coaxial cable
fiber-optic cable
twisted-pair wire
Q13: In CRC there is no error if the remainder at the receiver is _____.
nonzero
equal to the remainder at the sender
the quotient at the sender
zero
Q14: Distributed Queue Dual Bus is a standard for
WAN
LAN and MAN
LAN
MAN
Q15: A remote batch-processing operation in which data is solely input to a central computer would require a:
mixedband channel
simplex lines
telegraph line
All the above
Q16: A remote batch-processing operation in which data is solely input to a central computer would require a:
telegraph line
mixedband channel
All the above
simplex lines+
Q17: Computers in a LAN can be interconnected by radio and infrared technologies.
Modem
Network Topologies
Wireless LANs
Multiplexer
Q18: The _____ houses the switches in token ring.
transceiver
MAU
nine-pin connector
NIC
Q19: Which of the following divides the high speed signal into frequency bands?
t-switch
time-division multiplexer
modem
frequency-division multiplexer
Q20: “If the ASCII character G is sent and the character D is received, what type of error is this?”
multiple-bit
single-bit
burst
recoverable
Q21: An encyclopedic database
is easy for beginners to use
is an information utility that specializes in storing and searching information
All of the above
is generally free
Q22: A noiseless 3 KHz Channel transmits bits with binary level signals. What is the maximum data rate?
3 Kbps
6 Kbps
12 Kbps
24 Kbps.
Q23: “In IPv4, what is the value of the total length field in bytes if the header is 28 bytes and the data field is 400 bytes?”
107
428
427
407
Q24: Which of the following is not a disadvantage of wireless LAN?
higher error rate
interference of transmissions from different computers
Slower data transmission
All of the above
Q25: What can greatly reduce TCP/IP configuration problems?
WINS Server
PDC
DHCP Server
WINS Proxy
Q26: The geostationary satellite used for communication systems
rotates with the earth
is positioned over equator
remains stationary relative to the earth
All of the above
Q27: “What part of 192.168.10.51 is the Network ID, assuming a default subnet mask?”
192
192.168.10
51
0.0.0.5
Q28: A distributed network configuration in which all data/information pass through a central computer is
bus network
star network
ring network
Point-to-point network
Q29: Which of the following is a necessary part of the IPv6 datagram?
Extension header
Data packet from the upper layer
Base header
none
Q30: Which of the following is an advantage to using fiber optics data transmission?
low noise level
fast data transmission rate
All of the above
Resistance to data theft
Q31: The transmission signal coding method of TI carrier is called
Manchester
Binary
Bipolar
NRZ
Q32: “Usually, it takes 10-bits to represent one character. How many characters can be transmitted at a speed of 1200 BPS?”
12
1200
120
10
Q33: Which of the following statements is correct?
Control section of a synchronous modem contains the scrambler
Transmission section of a synchronous modem contains the scrambler
Receiver section of a synchronous modem contains the scrambler
Terminal section of a synchronous modem contains the scrambler
Q34: “Examples are packet switching using frame relay, and cell switching using ATM technologies. Select the best fit for answer”
Bandwidth alternatives
Inter organizational networks
Switching alternating
Extranets
Q35: The _____ houses the switches in token ring.
NIC
transceiver
nine-pin connector
MAU
Q36: A best-effort delivery service such as IPv4 includes _______.
error correction
error checking
none of the above
datagram acknowledgment
Q37: Modem is used in data transmission. When was it invented and in which country?
“1950, USA”
“1963, USA”
“1950, Japan”
“1965, Germany”
Q38: The encoding method specified in the EIA-232 standard is _____.
Manchester
NRZ-I
Differential Manchester
NRZ-L
Q39: Which of the following condition is used to transmit two packets over a medium at the same time?
Collision
Synchronous
Contention
Asynchronous
Q40: What is the default subnet mask for a class C network?
255.0.0.0
255.255.0.0
255.255.255.0
127.0.0.1
