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46 Cards in this Set
- Front
- Back
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Local area network |
Network of users that share computer resources in a limited area |
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Protocol |
Set of rules established for users to exchange information |
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Topology |
Architecture of a network |
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Token ring topology |
A network topology configured in a logical ring that complements the token passing protocol |
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Token passing |
A technique where an electrical token circulates around a network, control of token enables users to gain access to the network |
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IEEE |
Institute of electrical and electronic engineer, a major standard setting body for technology |
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Deterministic |
Access to the network is provided at fixed time intervals |
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Token ring hub |
A hub that manages the passing of the the token in a token ring network |
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Bus topology |
Computers share the media (coaxial cable) for data transmission |
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Star topology |
The most common networking topology today. Networking devices connect to a central switch or hub |
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Hub |
Broadcasts data it receives to all devices connected to it's ports |
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Multiport repeater |
Another name for hub |
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Broadcasts |
Transmission of data by hub to all devices connected to it's port |
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Switch |
Forwards a frame it receives directly out the port associated with its destination address |
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Ports |
The physical input/output interfaces to the networking hardware |
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Mesh topology |
All networking devices are directly connected to each other |
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OSI |
Open system interconnect |
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OSI physical layer |
Provides the electrical and mechanical connections to the network (ie NICs and twisted pair cables) |
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Osi Data link layer |
Handles error recovery, flow control, and sequencing (where MAC addressing is defined) |
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OSI network layer |
Accepts outgoing messages and combines messages or segments into packets, adding a header that includes routing information |
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OSI transport layer |
Concerned with message integrity between source and destination (ie transport control protocol TCP) |
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OSI session layer |
Provides the control function necessary to establish, manage, and terminate the connections (ie network file system NFS) |
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OSI presentation layer |
Accepts and structures the message for the application |
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OSI application layer |
Interacts with application programs that incorporate a communication component such as an internet browser and email |
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CSMA/CD |
Ethernet LAN media access method, carrier sense multiple access with collision detection |
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Frame |
Provides grouping of the information for transmission |
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Network interface card NIC |
Electronic hardware users to interface the computer to the network |
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MAC address |
A unique 6 byte address assigned by the vendor of the network interface cards |
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Organizationally unique identifier OUI |
The first three bytes of the MAC address that identifies the manufacturer |
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TCP/UDP port |
80 |
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HTTPS secure port |
443 |
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FTP port |
20 and 21 |
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SMTP port |
25 |
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POP port |
110 |
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TelNet port |
23 |
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Netstat -a |
Displays all connection and listening ports |
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Netstat -e |
Displays Ethernet statistics |
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Netstat -n |
Displays addresses and port numbers in numerical form |
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Netstat -p proto |
Displays connection for the protocol specified by proto. The proto may be TCP or UDP |
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Netstat -r |
Displays routing tables |
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Netstat -s |
Displays per protocol statistics |
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802.11a |
5GHz frequency 54Mbps throughput |
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802.11b |
2.5 GHz frequency 11 MPS throughput |
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802.11g |
2.4 GHz frequency 54 Mbps through put |
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802.11n |
2.5-5GHz frequency 65-150 Mbps through put |
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802.11ac |
5GHz frequency 65-150 Mbps through put |
