ITN 101 Midterm Exam Review
Questions and Answers
network - ANSWER-A group of computers and other devices (such as printers) that are
connected by and can exchange data via some type of transmission media, such as a
cable, a wire, or the atmosphere.
topology - ANSWER-how parts of a whole work together
Physical Topology - ANSWER-The physical layout of the media, nodes, and devices on
a network. It does not specify device types, connectivity methods, or addressing
schemes.
logical topology - ANSWER-A characteristic of network transmission that reflects the
way in which data is transmitted between nodes, including how access to the network is
controlled and how specific resources are shared on the network. May differ from its
physical topology.
P2P (peer-to-peer) network model - ANSWER-A network in which every computer can
communicate directly with every other computer. By default, no computer on a P2P
network has more authority than another.
scalable - ANSWER-The property of a network that allows an administrator to add
nodes or increase its size easily.
server - ANSWER-Any computer or application that provides a service, such as data or
other resources, to other devices.
client-server network model - ANSWER-A network where resources are managed by
the NOS via a centralized directory database.
domain - ANSWER-In the context of Windows Server NOSes, a group of users, servers,
and other resources that share account and security policies.
AD (Active Directory) - ANSWER-The centralized directory database that contains user
account information and security for the entire group of computers on a network.
AD DS (Active Directory Domain Services) - ANSWER-The Active Directory service that
manages the process allowing a user to sign on to a network from any computer on the
network and get access to the resources that Active Directory manages.
, client - ANSWER-A computer or application that makes a request from another
computer or application.
network services - ANSWER-A resource the network makes available to its users,
including applications and the data provided by these applications.
client-server applications - ANSWER-Data or a service requested by one computer from
another.
protocols - ANSWER-A standard method or format for communication between network
devices.
TCP/IP - ANSWER-A suite of networking protocols that includes TCP, IP, UDP, and
many others. TCP/IP provides the foundation for data exchange across the Internet.
web service - ANSWER-A web server serves up web pages to clients. Many
corporations have their own web servers, which are available privately on the corporate
network. Other web servers are public, accessible from anywhere on the Internet. The
primary protocol used by web servers and browsers (clients) is HTTP (Hypertext
Transfer Protocol). When HTTP is layered on top of an encryption protocol, such as
SSL (Secure Sockets Layer) or TLS (Transport Layer Security), the result is HTTPS
(HTTP Secure), which gives a secure transmission.
email services - ANSWER-Email is a client-server application that involves two servers.
The client uses SMTP (Simple Mail Transfer Protocol) to send an email message to the
first server, which is sometimes called the SMTP server (see Figure 1-4). The first
server sends the message on to the receiver's mail server, where it's stored until the
recipient requests delivery. The recipient's mail server delivers the message to the
receiving client using one of two protocols: POP3 (Post Office Protocol, version 3) or
IMAP4 (Internet Message Access Protocol, version 4). Using POP3, email is
downloaded to the client computer. Using IMAP4, the client application manages the
email while it's stored on the server.
FTP Service - ANSWER-FTP is a client-server application that transfers files between
two computers, and it primarily uses FTP (File Transfer Protocol). FTP does not provide
encryption and is, therefore, not secure.
Telnet service - ANSWER-The Telnet protocol is used by the Telnet client-server
command-line application to allow an administrator or other user to "remote in" or
control a computer remotely. Telnet is included in many operating systems, but
transmissions in Telnet are not encrypted, which has caused Telnet to be largely
replaced by other, more secure programs, such as the ssh command in the Linux
operating system.
Questions and Answers
network - ANSWER-A group of computers and other devices (such as printers) that are
connected by and can exchange data via some type of transmission media, such as a
cable, a wire, or the atmosphere.
topology - ANSWER-how parts of a whole work together
Physical Topology - ANSWER-The physical layout of the media, nodes, and devices on
a network. It does not specify device types, connectivity methods, or addressing
schemes.
logical topology - ANSWER-A characteristic of network transmission that reflects the
way in which data is transmitted between nodes, including how access to the network is
controlled and how specific resources are shared on the network. May differ from its
physical topology.
P2P (peer-to-peer) network model - ANSWER-A network in which every computer can
communicate directly with every other computer. By default, no computer on a P2P
network has more authority than another.
scalable - ANSWER-The property of a network that allows an administrator to add
nodes or increase its size easily.
server - ANSWER-Any computer or application that provides a service, such as data or
other resources, to other devices.
client-server network model - ANSWER-A network where resources are managed by
the NOS via a centralized directory database.
domain - ANSWER-In the context of Windows Server NOSes, a group of users, servers,
and other resources that share account and security policies.
AD (Active Directory) - ANSWER-The centralized directory database that contains user
account information and security for the entire group of computers on a network.
AD DS (Active Directory Domain Services) - ANSWER-The Active Directory service that
manages the process allowing a user to sign on to a network from any computer on the
network and get access to the resources that Active Directory manages.
, client - ANSWER-A computer or application that makes a request from another
computer or application.
network services - ANSWER-A resource the network makes available to its users,
including applications and the data provided by these applications.
client-server applications - ANSWER-Data or a service requested by one computer from
another.
protocols - ANSWER-A standard method or format for communication between network
devices.
TCP/IP - ANSWER-A suite of networking protocols that includes TCP, IP, UDP, and
many others. TCP/IP provides the foundation for data exchange across the Internet.
web service - ANSWER-A web server serves up web pages to clients. Many
corporations have their own web servers, which are available privately on the corporate
network. Other web servers are public, accessible from anywhere on the Internet. The
primary protocol used by web servers and browsers (clients) is HTTP (Hypertext
Transfer Protocol). When HTTP is layered on top of an encryption protocol, such as
SSL (Secure Sockets Layer) or TLS (Transport Layer Security), the result is HTTPS
(HTTP Secure), which gives a secure transmission.
email services - ANSWER-Email is a client-server application that involves two servers.
The client uses SMTP (Simple Mail Transfer Protocol) to send an email message to the
first server, which is sometimes called the SMTP server (see Figure 1-4). The first
server sends the message on to the receiver's mail server, where it's stored until the
recipient requests delivery. The recipient's mail server delivers the message to the
receiving client using one of two protocols: POP3 (Post Office Protocol, version 3) or
IMAP4 (Internet Message Access Protocol, version 4). Using POP3, email is
downloaded to the client computer. Using IMAP4, the client application manages the
email while it's stored on the server.
FTP Service - ANSWER-FTP is a client-server application that transfers files between
two computers, and it primarily uses FTP (File Transfer Protocol). FTP does not provide
encryption and is, therefore, not secure.
Telnet service - ANSWER-The Telnet protocol is used by the Telnet client-server
command-line application to allow an administrator or other user to "remote in" or
control a computer remotely. Telnet is included in many operating systems, but
transmissions in Telnet are not encrypted, which has caused Telnet to be largely
replaced by other, more secure programs, such as the ssh command in the Linux
operating system.
