Disciplina: Instalação e Configuração de Computadores

Trabalho elaborado por: Mário Lucas 8ºH

Physical – defines the characteristics of the physical

medium used to send and receive data bits.

Protocol and service- EIA/TIA 232 and 449, RJ45, Ethernet, CAT 5, X.21, HSSI

O modelo OSI camada 1

Data link – Translates PDUs from higher layers into

data frames. Defines the LLC and MAC sublayers.

Protocol and service – Frame Relay, PPP, HDLC, IEEE 802.2, 802.3, 802.5, FDDI, ATM, SDLC, LAPB, ISDN.

O modelo OSI camada 2

Netwark – concerned with end-to-end delivery of

data, logical addressing, and routing and how routesare identified.

Protocol and service – IP, IPX, and Apple Talk DDP

O modelo OSI camada 3

Transport – segments and reassembles data. Defines

reliable and unreliable data transmission, andconnection-oriented and connectionless protocols.

Protocol and Service – TCP, UDP, SPX

O modelo OSI camada 4

Session – Establishes, controls, and ends sessions.

Full-and half-duplex communications.

Protocols and Services – NFS, SQLM NetBIOS, Apple Talk, ASP, X Windows, RPC, DECNet SCP

O modelo OSI camada 5

Pressentation – Defines data formats, encluding

encryption, data conversion, audio/ visual, and graphics.

Protocol and Service – MPEG. HTML. MIDI, ASCII, EBCDIC, TIFF, GIF, PICT.

O modelo OSI camada 6

Application – Identifies and establishes availability

of communication partners. Determines whetherresources are sufficient for the communication to occur.

Protocol and Service – FTP, SMTP, Telnet, Web Browsers, CMIP, and Virtual Terminal Protocol

O modelo OSI camada 7

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