Is transmission medium part of the OSI layer 1 or not?

m4rtinm4rtin Member Posts: 170
in CCNA & CCENT
Is physical transmission medium(for example copper cable, optical cable) part of the OSI physical layer(layer 1)? icon_rolleyes.gif
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  • NetworkVeteranNetworkVeteran Member Posts: 2,338 ■■■■■■■■□□
    Yup! The cable and transceiver are typically considered physical-layer concerns.
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  • theodoxatheodoxa Member Posts: 1,340 ■■■■□□□□□□
    Layer 1 (Physical): Transmission Media (Cable), Hubs, Repeaters, 802.3, 802.11, RS-232...
    Layer 2 (Data Link): Switches, Bridges, Access Points (?), NICs (?), HDLC, PPP, Frame Relay, ATM, X.25...
    Layer 3 (Network): Routers, Layer 3 Switches (Catalyst 3550/3560, etc...), IPv4, IPv6, IPX...
    Layer 4 (Transport): TCP, UDP, SPX...
    Layer 5 (Session): SIP (?)...
    Layer 6 (Presentation): ASCII...
    Layer 7 (Application): HTTP, FTP, Telnet...
    R&S: CCENT → CCNA → CCNP → CCIE [ ]
    Security: CCNA [ ]
    Virtualization: VCA-DCV [ ]
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