Data communications and Lans Modules
1-3 study guide
What are the criteria used to select network media? - ANS-1.the distance the media can
successfully carry a signal
2.The environment where the media is to be installed
What are the functions of intermediary devices on a network? - ANS-direct path of the data
connect individual hosts to the network
What are the functions of end devices on a network? - ANS-originate the data that flows through
the network interface between humans and the communication network
Which device performs the function of determining the path that messages should take through
internetworks? - ANS-a router
Explain the difference between a LAN and a WAN. - ANS-LAN provides access over smaller
area
WAN provides access to other networks over a wider area.
What is a peer-to-peer network? - ANS-A network where a computer can run as both client and
server to share data to other users on the network.
What is a client/server network? - ANS-A medium through which clients access resources and
services from a central computer.
What type of network must a home user access in order to do online shopping? - ANS-Wireless
LAN
Define the following internet connectivity solutions:
a. cellular
b. DSL
c. satellite
d. cable
e. dial-up telephone
leased line - ANS-A. Internet access through cell towers using cell phone networks. Limited by
capabilities of phone and tower.
b.Internet access through Digital Subscriber Lines is a high bandwidth, connection that runs
over a telephone line. High bandwidth. High availability
, c.Internet access through satellite disks Low bandwidth high availability.
D. Internet access through television cable lines.
High bandwidth. High availability
E.Internet access through phone line, Low bandwidth high availability.
F. Internet access through leased line. A private circuit rented at high cost. High bandwidth. Low
availability.
What is meant by the term "converged network?" - ANS-A network capable of delivering data
voice and video between many different types of devices on the same network.
Define QoS - ANS-Quality of service in reference to the manner of managing congestion on a
network and insuring the quality of content delivery to all it's users (no buffering)
Identify characteristics of circuit-switched network. - ANS-A dedicated connection is formed on a
single line and no routing decisions are made. Remains connected until users terminate the
connection. Outdated.
Identify characteristics of packet-switched network. - ANS-Every packet of data can take it's own
route on multiple channels. It's faster and dynamic. The data after taking multiple routes
reassembles itself.
What is "cloud" computing? - ANS-A way in which we access and store data offloaded into
remote locations
Define the term telepresence. - ANS-Telepresence refers to a set of technologies which allow a
person to feel as if they were present
Identify five network security threats. - ANS-Viruses, Spyware, DOSS (denial of service), Identity
theft, Data theft.
What security solutions are available to network administrators? Describe three. - ANS-Antivirus
protects end devices from becoming infected.
Firewall blocks unauthorized access into the network
Access Control list filter traffic based on IP addresses
VPN secures network connection
Explain the following components of a router:
1-3 study guide
What are the criteria used to select network media? - ANS-1.the distance the media can
successfully carry a signal
2.The environment where the media is to be installed
What are the functions of intermediary devices on a network? - ANS-direct path of the data
connect individual hosts to the network
What are the functions of end devices on a network? - ANS-originate the data that flows through
the network interface between humans and the communication network
Which device performs the function of determining the path that messages should take through
internetworks? - ANS-a router
Explain the difference between a LAN and a WAN. - ANS-LAN provides access over smaller
area
WAN provides access to other networks over a wider area.
What is a peer-to-peer network? - ANS-A network where a computer can run as both client and
server to share data to other users on the network.
What is a client/server network? - ANS-A medium through which clients access resources and
services from a central computer.
What type of network must a home user access in order to do online shopping? - ANS-Wireless
LAN
Define the following internet connectivity solutions:
a. cellular
b. DSL
c. satellite
d. cable
e. dial-up telephone
leased line - ANS-A. Internet access through cell towers using cell phone networks. Limited by
capabilities of phone and tower.
b.Internet access through Digital Subscriber Lines is a high bandwidth, connection that runs
over a telephone line. High bandwidth. High availability
, c.Internet access through satellite disks Low bandwidth high availability.
D. Internet access through television cable lines.
High bandwidth. High availability
E.Internet access through phone line, Low bandwidth high availability.
F. Internet access through leased line. A private circuit rented at high cost. High bandwidth. Low
availability.
What is meant by the term "converged network?" - ANS-A network capable of delivering data
voice and video between many different types of devices on the same network.
Define QoS - ANS-Quality of service in reference to the manner of managing congestion on a
network and insuring the quality of content delivery to all it's users (no buffering)
Identify characteristics of circuit-switched network. - ANS-A dedicated connection is formed on a
single line and no routing decisions are made. Remains connected until users terminate the
connection. Outdated.
Identify characteristics of packet-switched network. - ANS-Every packet of data can take it's own
route on multiple channels. It's faster and dynamic. The data after taking multiple routes
reassembles itself.
What is "cloud" computing? - ANS-A way in which we access and store data offloaded into
remote locations
Define the term telepresence. - ANS-Telepresence refers to a set of technologies which allow a
person to feel as if they were present
Identify five network security threats. - ANS-Viruses, Spyware, DOSS (denial of service), Identity
theft, Data theft.
What security solutions are available to network administrators? Describe three. - ANS-Antivirus
protects end devices from becoming infected.
Firewall blocks unauthorized access into the network
Access Control list filter traffic based on IP addresses
VPN secures network connection
Explain the following components of a router:
