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Network + Chapter 2
network +; fifth edition chapter 2
Question | Answer |
---|---|
What does ISO, stand for? | International Organization for Standardization |
What is ISO, most known for? | ISO Model |
What does OSI in the OSI Model stand for stand for, and what does it represent? | OSI is short for OPEN SYSTEMS INTERCONNECTION. It represents the 7 layers of network communication. |
What are the 7 layers of the OSI Model? | Bottom to top, bottom layer being #1 Physical, #2 Data Link, #3 Network, #4 Transport, #5 Session, #6 Presentation, and #7 application. Tip to remember: All - People - Should - Trade - Nude - Data - Pics (top to bottom) |
What is the data encapsulation process? | Data - Segment - Packets - Frames - Bits Process of Information sent from node across medium. HINT: Don't smoke pot for breakfast |
What are PDUs (protocol data units)? | Are discrete amounts of data |
Layer 7 Application Layer | Interface between the user and computer. Provides services that directly support user applications. IE E-mail, File Transfer, Terminal Emulation, Database Access. Common Corresponding Protocols= SNMP, FTP, TELNET, WWW, HTTP, SMB, NCP, TCP, TFTP, NFS, |
Layer 6 Presentation Layer | Translation of data into understandable format for transmission. Encodes and Decodes data. Common Corresponding Protocols= JPEG, MIDI, MPEG, ALL MOVIE, MUSIC, PICS, FORMATS, NCP |
Layer 5 Session | Responsible for opening, closing, and using session. Allows communication between 2 or more nodes on network. Provides synchronization between communicating nodes. Common Protocols= File System(NFS), SQL, RPC |
Layer 4 Transport Layer | Responsible for packet handling. Ensures error free delivery. Repacks and divides messages into smaller packets(fragments and reassembles data. Handles error handling. Protocols= TCP, UDP, SPX, NETBEUI |
Layer 3 Network Layer | Logical addressing. Routing of message packets between host(IP\IPX) HARDWARE: Routers, Brouters Protocols= IP, IPX, RIP, ICMP, ARP, RARP, OSPF, EGP, IGMP, NETBEUI, DLC, DecNET |
Layer 2 Data Link Layer | Provides flow of data over a single link from 1 device to another. Packets placed into frames at this layer. Identifies specific computer on network. Error Detection, Mac address are resolved. Data frames are sent between layers. |
Data Link layer | has 2 sub layers, LLC & MAC. Logical Link Control and Media Access control. |
Layer 1 Physical | bits on the wire Hardware= Hubs, Repeaters, Amplifiers, Transceivers, multiplexers, recevivers, transmitters, connectors, cables, switches |
802.3 | Ethernet LAN= All forms of ethernet media and interfaces. |
802.5 | Token Ring LAN= All forms of token ring media and interfaces |
802.11 | Wireless Network= Standards for wireless networking for many different frequencies and user techniques |
802.15 | Wireless personal area networks= The coexistence of wireless personal area networks with other wireless devices in unlicensed frequency bands |
802.16 | broadband wireless metropolitan area network= the atmospheric interface and related functions associated with broadband wireless connectivity aka WiMax |