Test Bank Solution Manual for Computer Networks Already Passed
Logical Communication - Answers from an application's perspective, it is as if the hosts running the
processes were directly connected
segments - Answers converted application-layer messages from a sending application process into
transport layer packets by breaking the message into chunks and adding a transport layer header
Five Layers of Internet Model (Protocol Stack) - Answers Application, Transport, Network, Link, Physical
Datagram - Answers Chunks from the transport layer segment encapsulated within a network-layer
packet
Network Routers - Answers Only work on the network-layer fields of a datagram to move it from the
host to the destination across the network
Source and Destination Layers - Answers All five
Link layer switch - Answers Link and physical layers only
Router layers - Answers Network, Link, and Physical Layers
End system - Answers The host or destination in a network
Packet Switches - Answers takes a packet arriving on one of its incoming communication links and
forwards that packet on one of its outgoing communication links. EX Routers, Link-layer switches
Communication Links - Answers fiber, copper, radio, satellite
Transmission Rate - Answers The speed of a link measured in bits/second. (R)
Packets - Answers Small chunks of information that have been carefully formed from larger chunks of
information.
ISP - Answers Internet Service Provider
Protocols - Answers Control the sending and receiving of information within the internet
IP - Answers Internet Protocol - A set of rules for sending and receiving over the internet
TCP - Answers Transmission Control Protocol - provides reliable, ordered, and error-checked delivery of
a stream of packets on the internet. TCP is tightly linked with IP and usually seen as TCP/IP in writing.
UDP - Answers User Datagram Protocol. Used instead of TCP when guaranteed delivery of each packet is
not necessary. UDP uses a best-effort delivery mechanism.
RFC - Answers Request for Comments
Internet Standards - Answers RFC: Request for comments
, IETF: Internet Engineering Task Force
Distributed Applications - Answers Multiple end systems that exchange data with each other
API - Answers Application Programming Interface
Client - Answers A computer that requests data stored on a server.
Server - Answers A computer that awaits and responds to requests for data.
Access Network - Answers the network that physically connects an end system to the first router (also
known as the "edge router") on a path from the end system to any other distant end system.
DSL - Answers Digital Subscriber Line. A method of connecting to the Internet via a phone line. A DSL
connection uses copper telephone lines but is able to relay data at much higher speeds than modems
and does not interfere with telephone use.
Cable Internet Access - Answers Fast, direct Internet access via cable TV lines.
Physical Medium - Answers Examples of this include twisted-pair copper wire, coaxial cable, multimode
fiber-optic cable, terrestrial radio spectrum, and satellite radio spectrum.
Guided Media - Answers transmission flows along physical medium
Unguided Media - Answers signals propagate freely, e.g. radio
UTP - Answers Unshielded twisted pair. Cable type used in networks that do not have any concerns over
EMI, RFI, or cross talk. If these are a concern, STP is used.
Shared Medium - Answers Coaxial Cable, from sender to multiple recievers
geostationary satellites - Answers A satellite that orbits the earth at the same rate that the earth rotates
and thus remains over a fixed place above the equator.
Low Earth Orbit Satellites - Answers Non-permanent
store-and-forward transmission - Answers The packet switch must receive the entire packet before it
can begin to transmit the first bit of the packet onto the outbound link
output buffer - Answers Packet switches have multiple links attached to them. For each attached link the
packet switch has an ______ ______, which stores packets that the router is about to send into that link.
Output Queue - Answers Stores packets the router is about to send to a link
Queueing Delay - Answers - time waiting at output link for transmission
- depends on congestion level of router
Packet Loss - Answers The number of packets that are lost or
Logical Communication - Answers from an application's perspective, it is as if the hosts running the
processes were directly connected
segments - Answers converted application-layer messages from a sending application process into
transport layer packets by breaking the message into chunks and adding a transport layer header
Five Layers of Internet Model (Protocol Stack) - Answers Application, Transport, Network, Link, Physical
Datagram - Answers Chunks from the transport layer segment encapsulated within a network-layer
packet
Network Routers - Answers Only work on the network-layer fields of a datagram to move it from the
host to the destination across the network
Source and Destination Layers - Answers All five
Link layer switch - Answers Link and physical layers only
Router layers - Answers Network, Link, and Physical Layers
End system - Answers The host or destination in a network
Packet Switches - Answers takes a packet arriving on one of its incoming communication links and
forwards that packet on one of its outgoing communication links. EX Routers, Link-layer switches
Communication Links - Answers fiber, copper, radio, satellite
Transmission Rate - Answers The speed of a link measured in bits/second. (R)
Packets - Answers Small chunks of information that have been carefully formed from larger chunks of
information.
ISP - Answers Internet Service Provider
Protocols - Answers Control the sending and receiving of information within the internet
IP - Answers Internet Protocol - A set of rules for sending and receiving over the internet
TCP - Answers Transmission Control Protocol - provides reliable, ordered, and error-checked delivery of
a stream of packets on the internet. TCP is tightly linked with IP and usually seen as TCP/IP in writing.
UDP - Answers User Datagram Protocol. Used instead of TCP when guaranteed delivery of each packet is
not necessary. UDP uses a best-effort delivery mechanism.
RFC - Answers Request for Comments
Internet Standards - Answers RFC: Request for comments
, IETF: Internet Engineering Task Force
Distributed Applications - Answers Multiple end systems that exchange data with each other
API - Answers Application Programming Interface
Client - Answers A computer that requests data stored on a server.
Server - Answers A computer that awaits and responds to requests for data.
Access Network - Answers the network that physically connects an end system to the first router (also
known as the "edge router") on a path from the end system to any other distant end system.
DSL - Answers Digital Subscriber Line. A method of connecting to the Internet via a phone line. A DSL
connection uses copper telephone lines but is able to relay data at much higher speeds than modems
and does not interfere with telephone use.
Cable Internet Access - Answers Fast, direct Internet access via cable TV lines.
Physical Medium - Answers Examples of this include twisted-pair copper wire, coaxial cable, multimode
fiber-optic cable, terrestrial radio spectrum, and satellite radio spectrum.
Guided Media - Answers transmission flows along physical medium
Unguided Media - Answers signals propagate freely, e.g. radio
UTP - Answers Unshielded twisted pair. Cable type used in networks that do not have any concerns over
EMI, RFI, or cross talk. If these are a concern, STP is used.
Shared Medium - Answers Coaxial Cable, from sender to multiple recievers
geostationary satellites - Answers A satellite that orbits the earth at the same rate that the earth rotates
and thus remains over a fixed place above the equator.
Low Earth Orbit Satellites - Answers Non-permanent
store-and-forward transmission - Answers The packet switch must receive the entire packet before it
can begin to transmit the first bit of the packet onto the outbound link
output buffer - Answers Packet switches have multiple links attached to them. For each attached link the
packet switch has an ______ ______, which stores packets that the router is about to send into that link.
Output Queue - Answers Stores packets the router is about to send to a link
Queueing Delay - Answers - time waiting at output link for transmission
- depends on congestion level of router
Packet Loss - Answers The number of packets that are lost or
