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Computer Network Exam 2 Study Guide Questions and Answers
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Computer Network Exam 2 Study Guide Questions and Answers
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Computer Network Exam 2 Study GuideQuestions and Answers
IEEE (Institute of Electrical and Electronics Engineers): - Answer-An organization which
is best known for developing standards for the computers and electronics industry:
Token Ring Network: - Answer-An IEEE 802.5 standard LAN technology in which
information circulates in a closed ring of stations.
Firewall: - Answer-A hardware device or a software program designed to inspect
network traffic and either allow or deny the traffic to pass through or be blocked
according to a set of rules.
Internet service provider (ISP): - Answer-A facility/ organization that enables multiple
users to connect to the Internet.
Frame: - Answer-Structure used to transport data over a network. Contains source and
destination address, data, and a 32-bit frame check sequence. The Maximum data
amount for an Ethernet frame is 1500 bytes.
Cyclic Redundancy check (CRC): - Answer-A 32-bit error detection scheme able to
detect bit errors in streams of bits of varying length
Network Interface Card (NIC): - Answer-The expansion card added to a system to
provide network functionality. Each network card has its own unique MAC address.
MAC Address: - Answer-Media access control address. A 48- bit physical address
associated with every network interface. An example MAC address is 00- C0- F0- 27-
64- E2. 00-C0-F0-27-64-E2.
Fault-tolerance: - Answer-provides the ability of a system to withstand a hardware or
software fault and keep functioning.
Collision domain: - Answer-The portion of an Ethernet network in which collisions could
occur if two nodes transmit data at the same time.
Collision: - Answer-In Ethernet networks, the interference of one node's data
transmission with the data transmission of another node sharing the same segment.
Latency: - Answer-Latency is the time it takes for a frame to get from the source host to
the destination host.
Carrier Sense Multiple Access with Collision Detection (CSMA/ CD): - Answer-An IEEE
802.3 standard access method used to share bandwidth among a maximum of 1024
, stations. Two or more stations transmitting at a time will cause a collision, forcing
random waiting periods before retransmission is attempted.
Wavelength: - Answer-The distance between corresponding points on a wave's cycle. is
inversely proportional to frequency.
Frame: - Answer-Structure used to transport data over a network. Contains source and
destination address, data, and a 32-bit frame check sequence. The Maximum data
amount for an Ethernet frame is 1500 bytes.
Preamble: - Answer-The field in an Ethernet frame that signals to the receiving node
that data is incoming and indicates when the data flow is about to begin.
SFD (Start- of- frame delimiter): - Answer-A 1- byte field that indicates where the data
field begins in an Ethernet frame.
RJ- 45 (registered jack 45): - Answer-The standard connector used with shielded
twisted pair and unshielded twisted pair cabling.
RJ- 11 (registered jack 11): - Answer-The standard connector used with unshielded
twisted pair cabling (usually Cat 3) to connect analog telephones.
Coaxial cable: - Answer-A type of cable that consists of a central metal conducting core,
which might be solid or stranded and is often made of copper, surrounded by an
insulator, a braided metal shielding, called braiding, and an outer cover, called the
sheath or jacket. Coaxial cable, called "coax" for short, was the foundation for Ethernet
networks.
Thinwire: - Answer-RG- 58 coaxial cable used in 10base2 networks.
Thickwire: - Answer-RG- 8 coaxial cable used in 10base5 networks.
Hub: - Answer-A multiport device that broadcasts frames received on one port to all
other ports. All ports are in the same collision domain. Hubs are also known as
concentrators. Hubs operate at the physical layer (Layer 1) of the OSI model.
Switch: - Answer-A multiport device that forwards frames to a specific port based on
their destination MAC address. Each port is in its own collision domain. Traditional
network switches operate at layer 2 of the OSI model.
Tap: - Answer-Used to make a connection with coaxial cable. The tap may be a BNC T-
connector or a vampire tap.
Cable Tester: - Answer-A device that tests a cable for continuity impedance, frequency
response, or crosstalk.
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