ITN 100 MIDTERM EXAMS QUESTIONS AND
ANSWERS SET A+
✔✔The probability of detecting an error, given that one has occurred, using parity
checking is about: - ✔✔50%
✔✔Stop-and-wait ARQ uses ___________ type of data flow. - ✔✔half-duplex
✔✔Ethernet has been refined over the years and is now formally standardized as
IEEE802.3ac. - ✔✔True
✔✔Which of the following is way to reduce or eliminate crosstalk on a circuit, -
✔✔changing multiplexing techniques
✔✔Using parity, the probability for detecting an error, given that one has occurred, is: -
✔✔about 50% for either even or odd parity
✔✔Cross-talk: - ✔✔occurs when one circuit picks up signals in another
✔✔____________ refers to bits that have been changed, in error, from 1 to 0, or vice
versa, in a data transmission. - ✔✔Flipped bits
✔✔Point-to-point Protocol is a byte-count-oriented protocol. - ✔✔True
✔✔Which of the following is true about the data link protocol, PPP? - ✔✔it is commonly
used in WANs
✔✔The primary source of error in data communications is: - ✔✔spikes
✔✔With __________ ARQ, the sender pauses for a response from the receiver to alter
each message or packet of data. - ✔✔Stop and wait
,✔✔In a network, the type of errors caused during data transmission can be controlled
by the network hardware and software. - ✔✔True
✔✔In communication protocols, _________ are used to convey the user's meaning. -
✔✔information bits
✔✔Another term for impulse noise is: - ✔✔spikes
✔✔_____________ is an effective way to prevent attenuation. - ✔✔Adding repeaters or
amplifiers to a circuit
✔✔Media access controls refer to the need to control when computers transmit. -
✔✔True
✔✔_________________ is defined as the total number of information bits divided by
the total number of bits in the transmission. - ✔✔Transmission efficiency
✔✔With __________ ARQ, the sender immediately sends the next message or packet
of data. - ✔✔continuous
✔✔Cyclical redundancy check is one of the most popular polynomial error-checking
schemes. - ✔✔True
✔✔Overhead bits are used for error checking and marking the start and end of
characters and packets. - ✔✔True
✔✔Forward error correction is commonly used in satellite transmission. - ✔✔True
✔✔If a signal with a frequency of 500 MHz combines with a another signal of 1500 MHz
and they form a new signal of 2000 MHz; this is an example of: - ✔✔intermodulation
noise
✔✔Attenuation refers to the loss of signal strength. - ✔✔True
✔✔A client computer is assigned a data link layer address is by: - ✔✔hardware
manufacturers
✔✔The ______ defines what type of packets should be routed and what types of
packets should be discarded. - ✔✔ACL
✔✔TCP/IP operates only as connection-oriented. - ✔✔False
,✔✔The source port identifier in the TCP header tells the TCP software on the
destination computer, which application on the destination it should pass the packet to. -
✔✔False
✔✔A majority of routers use the following operating system: - ✔✔Cisco Internetwork
Operating System
✔✔IPv4 addresses offer unlimited opportunity for expansion and growth on the Internet.
- ✔✔False
✔✔An advantage of centralized routing is: - ✔✔routing decisions are simple
✔✔____________ refers to the type of routing in which the routing table is developed
by the network manager and modifications are made only when computers are added to
or removed from the network. - ✔✔Static routing
✔✔IGMP refers to: - ✔✔Internet Group Management Protocol
✔✔A type of message that is used when sending a message from one computer to
another computer is called a: - ✔✔unicast message
✔✔Part of the function of address resolution is translating the application layer address
of the destination into a network layer address. - ✔✔True
✔✔The negotiation by the transport layer at the sender with the transport layer at the
receiver to determine what size packets should be set up is done via establishing a(n)
___________ between the sender and receiver. - ✔✔TCP connection
✔✔The _____________ is used by a computer to determine how messages will travel
through the network. - ✔✔routing table
✔✔IPv4 uses ________ bytes per Internet address. - ✔✔4
✔✔When TCP/IP translates an application layer address into an IP address, it sends a
special __________ to the nearest DNS server. - ✔✔DNS request packet
✔✔In its simplest form, the __________ has two columns: the first column lists every
computer and device in the network, while the second column lists the computer or
device to which that computer should send messages, if they are destined for the
computer in the first column. - ✔✔routing table
✔✔_____________ routing is a method of routing in which each packet makes its own
way through the network. - ✔✔Connectionless
, ✔✔TCP uses _____________ so that the destination station can reassemble the
packets into the correct order. - ✔✔sequence numbers
✔✔A(n) ________ refers to a group of computers that are logically grouped together by
IP number. - ✔✔subnet
✔✔The newer form of IP, version 6 (Ipv6): - ✔✔has an increased address size from 32
bits to 128 bits
✔✔IP is responsible for error-free delivery of packets on a TCP/IP network. - ✔✔False
✔✔Routing is the process of determining the path or route through the network that a
particular message will follow from the sender to the recipient. - ✔✔True
✔✔Which of the following is not given to a client computer when it is first installed on a
TCP/IP network so that it has the appropriate routing/addressing information? -
✔✔application layer address
✔✔The transport layer must break messages from the application layer into several
_____ that can be sent to the data link layer. - ✔✔packets
✔✔The TCP portion of TCP/IP performs linking to the application layer. - ✔✔True
✔✔With ________ routing, computers or routers count the number of hops along a
route and periodically exchange information on the hop count with their neighbors. -
✔✔distance vector
✔✔Translating an application layer address to a network layer address and finally to a
data link layer address is called address resolution. - ✔✔True
✔✔___________ is the process of determining the path that a message will travel from
sending computer to receiving computer. - ✔✔Routing
✔✔A routing protocol used inside an autonomous system is called an exterior routing
protocol. - ✔✔False
✔✔TCP includes a sequence number so that the packets can be reassembled at the
destination in the correct order. - ✔✔True
✔✔Source port address is the logical address generated by the application layer on the
source computer to identify the application, which is sending the data. - ✔✔True
ANSWERS SET A+
✔✔The probability of detecting an error, given that one has occurred, using parity
checking is about: - ✔✔50%
✔✔Stop-and-wait ARQ uses ___________ type of data flow. - ✔✔half-duplex
✔✔Ethernet has been refined over the years and is now formally standardized as
IEEE802.3ac. - ✔✔True
✔✔Which of the following is way to reduce or eliminate crosstalk on a circuit, -
✔✔changing multiplexing techniques
✔✔Using parity, the probability for detecting an error, given that one has occurred, is: -
✔✔about 50% for either even or odd parity
✔✔Cross-talk: - ✔✔occurs when one circuit picks up signals in another
✔✔____________ refers to bits that have been changed, in error, from 1 to 0, or vice
versa, in a data transmission. - ✔✔Flipped bits
✔✔Point-to-point Protocol is a byte-count-oriented protocol. - ✔✔True
✔✔Which of the following is true about the data link protocol, PPP? - ✔✔it is commonly
used in WANs
✔✔The primary source of error in data communications is: - ✔✔spikes
✔✔With __________ ARQ, the sender pauses for a response from the receiver to alter
each message or packet of data. - ✔✔Stop and wait
,✔✔In a network, the type of errors caused during data transmission can be controlled
by the network hardware and software. - ✔✔True
✔✔In communication protocols, _________ are used to convey the user's meaning. -
✔✔information bits
✔✔Another term for impulse noise is: - ✔✔spikes
✔✔_____________ is an effective way to prevent attenuation. - ✔✔Adding repeaters or
amplifiers to a circuit
✔✔Media access controls refer to the need to control when computers transmit. -
✔✔True
✔✔_________________ is defined as the total number of information bits divided by
the total number of bits in the transmission. - ✔✔Transmission efficiency
✔✔With __________ ARQ, the sender immediately sends the next message or packet
of data. - ✔✔continuous
✔✔Cyclical redundancy check is one of the most popular polynomial error-checking
schemes. - ✔✔True
✔✔Overhead bits are used for error checking and marking the start and end of
characters and packets. - ✔✔True
✔✔Forward error correction is commonly used in satellite transmission. - ✔✔True
✔✔If a signal with a frequency of 500 MHz combines with a another signal of 1500 MHz
and they form a new signal of 2000 MHz; this is an example of: - ✔✔intermodulation
noise
✔✔Attenuation refers to the loss of signal strength. - ✔✔True
✔✔A client computer is assigned a data link layer address is by: - ✔✔hardware
manufacturers
✔✔The ______ defines what type of packets should be routed and what types of
packets should be discarded. - ✔✔ACL
✔✔TCP/IP operates only as connection-oriented. - ✔✔False
,✔✔The source port identifier in the TCP header tells the TCP software on the
destination computer, which application on the destination it should pass the packet to. -
✔✔False
✔✔A majority of routers use the following operating system: - ✔✔Cisco Internetwork
Operating System
✔✔IPv4 addresses offer unlimited opportunity for expansion and growth on the Internet.
- ✔✔False
✔✔An advantage of centralized routing is: - ✔✔routing decisions are simple
✔✔____________ refers to the type of routing in which the routing table is developed
by the network manager and modifications are made only when computers are added to
or removed from the network. - ✔✔Static routing
✔✔IGMP refers to: - ✔✔Internet Group Management Protocol
✔✔A type of message that is used when sending a message from one computer to
another computer is called a: - ✔✔unicast message
✔✔Part of the function of address resolution is translating the application layer address
of the destination into a network layer address. - ✔✔True
✔✔The negotiation by the transport layer at the sender with the transport layer at the
receiver to determine what size packets should be set up is done via establishing a(n)
___________ between the sender and receiver. - ✔✔TCP connection
✔✔The _____________ is used by a computer to determine how messages will travel
through the network. - ✔✔routing table
✔✔IPv4 uses ________ bytes per Internet address. - ✔✔4
✔✔When TCP/IP translates an application layer address into an IP address, it sends a
special __________ to the nearest DNS server. - ✔✔DNS request packet
✔✔In its simplest form, the __________ has two columns: the first column lists every
computer and device in the network, while the second column lists the computer or
device to which that computer should send messages, if they are destined for the
computer in the first column. - ✔✔routing table
✔✔_____________ routing is a method of routing in which each packet makes its own
way through the network. - ✔✔Connectionless
, ✔✔TCP uses _____________ so that the destination station can reassemble the
packets into the correct order. - ✔✔sequence numbers
✔✔A(n) ________ refers to a group of computers that are logically grouped together by
IP number. - ✔✔subnet
✔✔The newer form of IP, version 6 (Ipv6): - ✔✔has an increased address size from 32
bits to 128 bits
✔✔IP is responsible for error-free delivery of packets on a TCP/IP network. - ✔✔False
✔✔Routing is the process of determining the path or route through the network that a
particular message will follow from the sender to the recipient. - ✔✔True
✔✔Which of the following is not given to a client computer when it is first installed on a
TCP/IP network so that it has the appropriate routing/addressing information? -
✔✔application layer address
✔✔The transport layer must break messages from the application layer into several
_____ that can be sent to the data link layer. - ✔✔packets
✔✔The TCP portion of TCP/IP performs linking to the application layer. - ✔✔True
✔✔With ________ routing, computers or routers count the number of hops along a
route and periodically exchange information on the hop count with their neighbors. -
✔✔distance vector
✔✔Translating an application layer address to a network layer address and finally to a
data link layer address is called address resolution. - ✔✔True
✔✔___________ is the process of determining the path that a message will travel from
sending computer to receiving computer. - ✔✔Routing
✔✔A routing protocol used inside an autonomous system is called an exterior routing
protocol. - ✔✔False
✔✔TCP includes a sequence number so that the packets can be reassembled at the
destination in the correct order. - ✔✔True
✔✔Source port address is the logical address generated by the application layer on the
source computer to identify the application, which is sending the data. - ✔✔True
