Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
Compsci #4
From 5.1
| Term | Definition |
|---|---|
| Personal Area Network | Short range |
| Local Area Network(LAN) | Building/campus |
| Metropolitan Area Network(MAN) | Community |
| Wide Area Network(WAN) | Greater distances |
| Bus topology | Ethernet |
| Star topology | Wireless networks with central AP |
| Protocols | Rules by which activities are conducted on a network |
| Collision Detection | Used in Ethernet. Both machines stop and wait for an independent, random time |
| Collision Avoidance | Used in WiFi, where not all machines can hear each other. Give advantage to the machine that has already been waiting |
| Devices for combining networks | Repeater, Bridge, Switch, Router |
| Repeater | Passes all messages across two busses |
| Bridge | Passes only messages that are destined for computers on the other bus |
| Switch | Acts like a bridge but with connections to multiple busses |
| Router | A physical or virtual internetworking device that forwards data packets between computer networks. Connects two incompatible networks |
| Methods of Process Communication | Client-server and Peer-to-Peer |
| Client-server | Many clients, one server. Clients make requests of other processes. Server satisfies requests made by clients |
| Peer-to-peer(P2P) | Two processes communicating as equals. Processes execute on a temporary basis |
| Internet Service Provider(ISP) | Provides connectivity to the internet (Hotpot, telephone lines, cellular, cable/satellite systems) |
| Internet Protocols | Control how messages are transferred over the internet. This software is on every computer on the internet. Accomplished by a multi-level hierarchy |
| IP address | Pattern of 32 or 128 bits often represented in dotted decimal notation |
| Domain name system(DNS) | Used to translate hostnames into numeric IP addresses |
| Internet Corporation for Assigned Names and Numbers(ICANN) | Responsible for IP addressing and domain name management |
| Internet software layers | Application, Transport, Network, Link |
| Application | Constructs message with address |
| Transport | Chops message into packets |
| Network | Handles routing through the internet |
| Link | Handles actual transmission of packets |
| WWW | World Wide Web |
| Hypertext | Combines internet technology with concept of linked documents. Embeds hyperlinks to other documents |
| Hypertext Markup Language(HTML) | Encoded as a text file |
| Webservers | provide access to documents |
| Documents | Identified by URLs and transferred using HTTP |
| Uniform Resource Locator(URL) | The address of a unique resource on the internet |
| Browsers | Present materials to the user |
| Client side (browser) | Action takes place on the user's computer (JavaScript, Macromedia Flash, etc) |
| Server side (webserver) | The action takes place on a web server (CGI, Servlets, etc) |
| Forms of cyber attack | Malware (viruses), Denial of service(DoS), Spam |
| Protection | Firewalls, Spam filters, Proxy servers, Antivirus software |
| Cryptography | HTTPS for secure internet access |
| Public key | Used to encrypt messages |
| Private key | Used to decrypt messages |
| Certificate Authorities | Trusted to maintain lists of public keys. Provide Certificates to clients containing a party’s name and its public key |
Created by:
jolly_n4
Popular Computers sets