Network Terminology

Modems: OSI-Layer 1 device. Modulator-demodulator, device that converts digital and analog signals, allows data to be transmitted over voice grade telephone lines (PSTN). Modem standards include: V.21, V.22 bis, V.32 bis, V.34, V.42 bis, etc.

Repeaters: OSI-Layer 1 device. Regenerates and propagates electrical signals between two network segments. Repeater standards include: Ethernet, IEEE 802.3 (10Base5, 10Base2, 10BaseT, 10BaseFX), FDDI, ATM, etc.

Modems: OSI-Layer 1 device. Modulator-demodulator, device that converts digital and analog signals, allows data to be transmitted over voice grade telephone lines (PSTN). Modem standards include: V.21, V.22 bis, V.32 bis, V.34, V.42 bis, etc.