Computer Networking Exam Prep Questions and
Answers
Internet - ✔✔A computer network that interconnects hundreds of millions of computing
devices throughout the world; an infrastructure that provides services to applications
Hosts or End Systems - ✔✔A device that has access to the Internet
Communication Links and Packet Switches - ✔✔Used to connect end systems together
Transmission Rate - ✔✔How fast a link can transmit data, measured in bits/second
Packets - ✔✔Segments of data sent from one end system to another
Routers and Link-Layer Switches - ✔✔Forward packets toward their ultimate destinations
Route or Path - ✔✔The sequence of communication links and packet switches traversed by a
packed from the sending end system to the receiving end system
Internet Service Providers - ✔✔A network of packet switches and communication links that
provides a variety of types of network access to end systems
Protocol - ✔✔Defines the format and the order of messages exchanged between two or
more communicating entities, as well as the actions taken on the transmission and/or receipt of
a message or other event
Transmission Control Protocol and Internet Protocol - ✔✔The most important protocols in
the Internet
, Internet Standards - ✔✔Specify what each protocol does
Internet Engineering Task Force - ✔✔Developer of Internet standards
Request for Comments - ✔✔IETF documents that outline the standards for each protocol
Distributed Applications - ✔✔Applications that involve multiple end systems exchanging
data with each other; only run on end systems, not in the packet switches
Application Programming Interface - ✔✔Specifies how a program running on one end
system asks the Internet infrastructure to deliver data to a specific destination program running
on another end system
The Network Edge - ✔✔The collection of end systems (including servers) that are attached
to the Internet
Clients - ✔✔An end system that initiates a connection
Servers - ✔✔An end system that waits for a connection
Data Center - ✔✔A large collection of servers
Access Network - ✔✔The network that physically connects and end system to the first router
on a path from the end system to any other end system
Digital Subscriber Line - ✔✔Uses the existing telephone line to exchange data with a DSLAM
located in the telco's local central office
Answers
Internet - ✔✔A computer network that interconnects hundreds of millions of computing
devices throughout the world; an infrastructure that provides services to applications
Hosts or End Systems - ✔✔A device that has access to the Internet
Communication Links and Packet Switches - ✔✔Used to connect end systems together
Transmission Rate - ✔✔How fast a link can transmit data, measured in bits/second
Packets - ✔✔Segments of data sent from one end system to another
Routers and Link-Layer Switches - ✔✔Forward packets toward their ultimate destinations
Route or Path - ✔✔The sequence of communication links and packet switches traversed by a
packed from the sending end system to the receiving end system
Internet Service Providers - ✔✔A network of packet switches and communication links that
provides a variety of types of network access to end systems
Protocol - ✔✔Defines the format and the order of messages exchanged between two or
more communicating entities, as well as the actions taken on the transmission and/or receipt of
a message or other event
Transmission Control Protocol and Internet Protocol - ✔✔The most important protocols in
the Internet
, Internet Standards - ✔✔Specify what each protocol does
Internet Engineering Task Force - ✔✔Developer of Internet standards
Request for Comments - ✔✔IETF documents that outline the standards for each protocol
Distributed Applications - ✔✔Applications that involve multiple end systems exchanging
data with each other; only run on end systems, not in the packet switches
Application Programming Interface - ✔✔Specifies how a program running on one end
system asks the Internet infrastructure to deliver data to a specific destination program running
on another end system
The Network Edge - ✔✔The collection of end systems (including servers) that are attached
to the Internet
Clients - ✔✔An end system that initiates a connection
Servers - ✔✔An end system that waits for a connection
Data Center - ✔✔A large collection of servers
Access Network - ✔✔The network that physically connects and end system to the first router
on a path from the end system to any other end system
Digital Subscriber Line - ✔✔Uses the existing telephone line to exchange data with a DSLAM
located in the telco's local central office
