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45 Cards in this Set
- Front
- Back
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Define Host |
Full Access, Provides services to clients |
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Define Client |
Requests services from Host |
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Define Hub |
Connects LAN segments
packet arrives at one port and is copied to other ports |
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Define Switch |
filters/forwards packets between LAN segments
smarter than a hub |
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Define Router |
Forwards packets between Networks |
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What is WAP |
Wireless application protocol |
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What is a Proxy Server |
Between applicaition and real server
improves performance/filters requests |
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What is the purpose of a firewall |
Prevent unauthorized user access
can be hardware or software |
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What is VPN concentrator |
built for creating remote access |
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What are the 3 layers of Routing |
Access- user workgroup access to resources
Distribution- routing, filtering, WAN access
Core- transports large amts of traffic quickly |
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Define BUS topology |
All devices connect to a central cable |
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Define Star topology |
All devices connect to central hub |
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Define Ring topology |
All devices connected to eachother
- expensiv, difficult, high bandwith |
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Define Mesh topology |
Redundant interconnections |
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define MAN |
Metropolitan Area Network
Town/City |
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Define GAN |
Global Area Network
unlimitted geographically |
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What is the OSI model |
Open System Interconnection Model |
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List all parts of the OSI model (PDNTSPA |
Physical Data Link Network Transport Session Presentation Application |
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What is the TCP/IP Model |
Four layer reference model (corresponds to one or more layers of OSI model) |
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What are the 4 layers of the TCP/IP Model |
Applicaition Transport Internet Network |
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What is the difference between IPv4 and IPv6 |
IPv4 is most widely used 32 bit format
IPv6 is 128 bits not 32, supports more addresses |
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Define NIPRnet |
Non-Secure Internet Protocol Router Network
- evolved from MILnet, which evolved form ARPAnet in the 1980s |
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Define SIPRnet |
Secure Internet Protocol Router Network
- Secure up to SECRET/NOFORN |
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Define JWICS |
Joint Worldwide Intelligence Communications System
- upto TS/SCI |
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What is DoDN |
Global Informatin Grid (GIG)
- golbally interconnnected, includes all owned/leased comms and computing systems |
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What is DISN |
Centrally managed and configured, provides long haul information transfer for all DoD |
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What is ONE-NET |
Network for OCONUS Navy shore commands |
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What is IT21 |
Information Technology for 21st Century
shipboard network |
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Define Machine Language |
Lowest level programming language |
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Define Assembly Language |
Same as Machine Language
can use names instead of numbers |
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Define Operating System |
Performs basic tasks, controls peripheral devices |
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Define Applicaiton |
Group of programs for end use |
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What is a virus |
Program/code loaded onto P.C. w/o permission |
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Define Worm |
Replicates |
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Define Trojan |
Disguises |
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What is a backdoor |
undocumented way of gaining acces to a program
written by programmer |
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define phishing |
fishing for information |
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What is network enumeration |
discovery of hosts/devices on network |
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Define Buffer Overflow |
When a program/process tries to store more data than a buffer is intended to handle |
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Define SQL injection |
attack on database driven website |
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What is a Dictionary Attack |
attempts to breach password based security systems |
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What is Privelage Escalation |
attack on a program, granting elevated access |
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What is a Brute Force Attack |
trial/error to decode encrypted data, exhaustive effort |
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What is PKI |
Public Key Infrastructure
1 pair of keys: 1 public 1 private
obtained through trusted authority |
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What is DNS |
Domain Name Service
associates domain names to IP addresses |
