How can we help?

You can also find more resources in our Help Center.

60 terms

BCIS / CH. 6

STUDY
PLAY
A computer ______ is a collection of computers that communicate with one another over transmission lines.
network
A(n) _____ connects computers at different geographic locations.
WAN
Which of the following is the distinguishing feature of LAN?
single location
A _____ is a set of rules that two communicating devices follow.
protocol
Private networks are called _____.
LANs
To provide seamless flow to networks that comprise an Internet and elaborate scheme called a(n) _____ is used.
layered protocol
Computer and printers on a LAN are connected to a _____ to communicate & transmit messages on the LAN.
switch
A(n) _____ is a special-purpose computer that receives and transmits messages on the LAN.
switch
The hardware component that connects a printer's circuitry to the networks is called a(n) ______.
NIC
Each NIC has a worldwide, unique identifier, called ______.
MAC address
An NIC built into the computer's circuitry is called a(n) ______.
onboard NIC
A(n) ______ connector is used to connect the UTP cable into NIC devices on the LAN.
RJ-45
Reducing the cross-wire signal interference that occurs when wires run parallel for long distances is made possible by _____.
twisting the wires in a UTP
The connections between switches can use UTP cable, but if they carry a lo of traffic or are far apart, _____.
the UTP cable may be replaced by optical fiber cables
IEEE LAN protocols always start with the numbers _______.
802
One of the most common optical connectors is a(n) _______.
ethernet
Most onboard NIC's support all of the following transmission rates except ______.
10,000 Mbps
Communications speeds are measured in ______.
bits
In order for a printer or laptop to connect to a wireless LAN they must have a(n) ______.
WNIC
______ is the dominant WLAN standard today.
IEEE 802.11g
Wireless devices connect to a wireless LAN using a(n) _______.
access point
The access point sends and receives wireless traffic using the _____ protocol and then communications with the switch using the _____ protocol.
802.11; 802.3
______ is a wireless protocol used to communicate over short distances.
bluetooth
Transmission speeds of 54mb/sec are commonly found when using ______.
wireless LAN
Frame relay and ATM are the protocols used for ______ networks.
PSDN
Which of the following is not a function of an ISP?
provides a dedicated network over the Internet
A ______ must be used to convert an analog signal to a digital one, when trying to transmit data over a typical phone line.
modem
Which of the following is true of DSL modems?
their signals do not interfere with voice telephone lines
_____ is good for homes and small businesses because they receive more data than they transmit.
ADSL
If a business needs high speed in both directions they should select _____ modems.
SDSL
What is the performance guarantee offered by SDSL connections?
they offer the same fast speed in both directions
Broadband communications have transmission speeds in excess of __.
256 kbps
_____ modems modulate in such a way that they do not interfere with TV signals, even though they use the same lines.
cable
Which of the following is true of cable modems?
cable modems use their own protocols
Which of the following is not a WAN protocol?
IEEE 802.3
Which of the following WAN protocols has the greatest potential for speed?
WiMax
_____ lines typically have transmission speeds less than 56 kbps.
narrowband
Broadband communications have transmission speeds in excess of _____.
256 kbps
Which of the following is an access device that connects each site to the transmission lines?
switch
A large company with production facilities in Houston, Atlanta, and Philadelphia would probably use _____ lines to transmit large amounts of data between the sites.
leased
_____ are special purpose computers that move network traffic between nodes.
routers
Which of the following is true of leased line networks?
network traffic is moved through a special-purpose computer called a modem
Which of the following transmission lines offers data transmission speeds of up to 40 Cbps?
optical fiber cables
Vendors develop and maintain leased lines and networks that are called ______.
PSDNs
The site where a leased line connects to a PSDN networks is called a(n) ______.
POP
All of the following are advantages of using PSDN except _______.
in a PSDN, separate lines connect new site to all other sites
Which of the following is not one of the protocols used by PSDN?
WiMax
Which of the following is true of the protocols used by PSDN?
ATM supports both voice and data communications
A(n) ____ uses the Internet or other Internet to create the appearance of private, point-to-point connections.
VPN
The connection between the VPN client and VPN server is called a ___.
tunnel
_____ communications are secure, even though they are transmitted over the Internet.
VPN
Which of the following applies to asymmetric encryption?
one key encodes the messages, one key decodes the message
Which is a special version of asymmetric encryption that is popular on the Internet?
public key/private key
HTTPS and SSL/TLS utilize which of the following?
a communication of public key/private key and symmetric encryption
If you see https instead of http in the address bar of your browser you are using ______.
SSL/TSL
A(n) _____ firewall examines each part of the message and decides whether it will let that part pass through to the network.
packet-filtering
A(n) _____ is a computing device that prevents unauthorized network access.
firewall
Packet-filtering firewall perform all of the following except _____.
encrypt data for transmission
_______ firewall are the simplest type of firewall.
packet-filtering
The rules about who is allowed and who is not allowed into your network are known as ______.
access control list