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Host/Client
- Host - Server
- Client - User
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Router
Device that jons multiple wired or wireless networks together
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WAP
- Wireless Access Protocol
- Commonly used web browser for mobile devices
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Proxy Server
Internet server that controls client access to the Internet
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Firewall
Used to block unauthorized access while permitting authorized communications
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Back-Up
Copies of data to be used to restore the original after data is lost
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Topology
LAN
WAN
MAN
GAN
- Bus, Star, Ring, Mesh - DRAW
- Local - office building
- Wide - state, providence, country
- Metro - large campus or city
- Global - unlimited geographical area
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OSI Model
- Application
- Presentation
- Session
- Transport
- Network
- Data Link
- Physical
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TCP/IP Model
- Application
- Transport
- Intenet
- Network Interface
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IPv4 & IPv6
- IPv4 - 32 bit IP addresses
- IPv6 - 128 bit IP addresses
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NMCI
Navy/Marine Corps Intranet
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ONENET
Secure IT infrastructure to OCONUS Navy locations
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Machine Language
Low level binary code
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Assembly Language
Low level programming language using human readable instructions
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High-Level Language
Enables programmers to write programs that are independent of a particular type of computer
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Operating System
Interface between hardware and user
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Application
Program designed to perform a specific function
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Virus
Designed to infect, destroy, modify or cause other problems w/ computer
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Worm
Self-replicating virus that does not alter files but resides in active memory
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Trojan
Program that appears legitimate but performs illicit activities when run
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Backdoor
Allows user access and control over network
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Phishing
Attempt to acquire sensitive informtion such as usernames, passwords, credit card numbers, etc
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PKI
- Public Keying Infrastructure
- Non-repudidation
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DNS
- Domain Name System
- Translates domain names into numerical identifiers
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