Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
27 Cards in this Set
- Front
- Back
OSI Model
|
People dont need to see Paula Abdule
Please do not throw sausage pizza away |
|
Layer 7
|
Application
FTP/DNS/SMTP - browsers |
|
Layer 6
|
Presentation
Common format - compresses, encrypted MPEG, GIF, JPEG |
|
Layer 5
|
Session
Logical communication connection between 2 hosts Full Duplex (2 way simultaneously) Half (2 way one at time) Simples (one way) |
|
Layer 4
|
Transport
tcp/ User Data gram Client and server devices support |
|
Layer 3
|
Network
Routing, packets IP addresses |
|
Layer 2
|
Data Link
Bridge and switches Bits are organized into frames *MAC |
|
Layer 1
|
Physical
Wire, fiber,or wirless |
|
TCP/IP Model
|
Collection of communication protocols used to over data exchange on the Internet
|
|
TCP/IP Model Layers
|
1. Process - Session, presentation,& app layers of OSI
2. Host to host - similar to transport 3. Networking - creates logical networks - IP 4. Network Access - physical and data layers |
|
TCP/IP Protocals
ARP |
Address resolution - resolves IP and MAC addresses
|
|
TCP/IP Protocals
IP |
Used to move info between nodes
|
|
TCP/IP Protocals
TCP |
Connection-oriented protocol
*error detection, retransmission of lost segments |
|
TCP/IP Protocals
UDP |
Connectionless uses port #s and error detection
*Internet radio, video - parts may drop |
|
TCP/IP Protocals
DHCP * |
Dynamic host configuration protocol
1.clients request access 2. the DHCP server manages a group of addresses for each network 3. Addresses are assigned on a first come first served basis 4. Addresses are provided for a given period of time using a lease processes |
|
TCP/IP Protocals
DNS |
Domain Name Service - resolve device names into IP addresses
|
|
TCP/IP Protocals
IGMP |
Internet Group Mang. used with IP multicasting to indicate when a device is joining a mutlicast-enabled app.
|
|
Router
|
layer 3
|
|
Switch
|
layer 2
|
|
Gateway
|
all layers - best answer is layer 7
|
|
Appliance
|
specialized networking device that supports many different networking functions. - single task
|
|
Data network types
|
LAN - house, floor
CAN - campus MAN - metro - city WAN - Wide Switched network - froward traffic between segment using a single type of network protocol (layer 2) Routed network - connect a LAN to a CAN (layer 3) |
|
Data Network Topology
|
Star - one central point
Bus - line Ring - circle Mesh - all to all |
|
Network Transition Methodologies
|
Ethernet
Cable modem DSL ATM - high speed fiber-based SONET - faster offered by phone companies VPN |
|
Data Services
|
RPC - execute a model, subroutine, or procedure
DS - directory services Data access services - mediates the access of data |
|
Data Services Cont.
|
Messaging (asynchronous - email/synchronous - IM)
Data exchange - HTTP Peer to peer - Napster Administrative services - SSH - replaces telnet - secure encrypted environment |
|
Data Services Cont.
|
RAS - remote access to a computer
Info services - Network time (clocks all same) VOIP |