Chapter 5 SimNet Complete Answers
network ️allows user to communicate and share information between computer and various devices -internet wouldn't be possible without networks
Local area Network (LAN) ️is a data communication system consisting of multiple devices that are
relatively near...
network ✔️allows user to communicate and share information between computer and various devices
-internet wouldn't be possible without networks
Local area Network (LAN) ✔️is a data communication system consisting of multiple devices that are
relatively near each other and are physically connected using cables or wireless media
wide are network (WAN) ✔️is the connection of two or more central computers or LANs, generally
across a wide geographical area
intranet ✔️-business offer an internal version of the internet
-this contains only the company's private information
extranet ✔️this can be used to share some of a company's intranet resources with people outside the
organizations
Attenuation ✔️is the loss of intensity and clarity of the data signal being transmitted. It is often
affected by distance
Banwidth ✔️or speed, is the amount of data that can be transmitted over a given amount of time
-measured in megabits per second (Mbps) or gigabits per second (Gbps)
Network media ✔️the means used to link parts of a computer network are referred to as _____
Node ✔️the network uses the media to carry data from one node, or connection point, to another -
Connection point within a network
, Twisted-pair cable ✔️normally consists of four pairs of wires that are twisted around each other. All
wires are collectively bound together in a layer of plastic that you would refer to as the network cable
Coaxial cable ✔️consists of a single copper wire that is surrounded by insulation and a wire mesh
shield, all inside a plastic sheath
Fiber-optic cable ✔️consists of a thin stand of glass that transmits pulsating beams of light rather than
electric current
wireless networks ✔️use radio signals that travel through the air to transmit data
wireless access point (WAP) ✔️to create a wireless LAN, a wireless access point, is needed. All nodes
connect to this device -connects single or multiple PSc in the wireless environment
Wireless adapter ✔️most desktop computers require an internal or external wireless adapter to
connect to a WAP -A piece of hardware that is plugged into a desktop computer to gain Wi-fi access
Wi-fi ✔️the most popular standard for wireless networking is called 802.11 or Wi-fi. There have been
various specifications for Wifi: 802.11b, 802.11g,802.11n,802.11ac (currently the fastest)
packets ✔️data moves though networks in structures known as packets, which are pieces of a message
broken down into small units by the sending device and reassembled by the recieving devices
-Packets have 2 parts Header, and Payload
Header ✔️This contains information needed by the network, such as the address of the destination
node
Payload ✔️this contains the actual data being transmitted
protocols ✔️are rules of communication that ensure packets are sent, recieved, and interpreted
properly, and that data integrity, or accuracy, is guaranteed.
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