Chapter 2: Fundamentals Of Ethernet LAN Flashcards
What is UTP?
Unshielded twisted pair.
What is SFP+?
SFP+: small form-factor pluggable. It’s a slot on a switch that can be swapped for a different Ethernet transceiver.
What is a NIC?
Network interface card. It’s the part that has the physical Ethernet port and is connected to (or can be connected to) a device.
What is OUI?
Organizationally unique identifier. It’s the first half of the MAC address, assigned by the IEEE and unique to each manufacturer.
What is a MAC address?
Media access control address. It’s a unique, burned-in number used to identify the hardware on a network.
What is BIA?
Burned-in address. It’s a number burned into a ROM chip used to assign permanent MAC addresses to networking hardware.
Unicast, broadcast, multicast: what are these?
Unicast: a single LAN interface.
Broadcast: all devices on this LAN.
Multicast: some devices on this LAN.
What are the 7 parts of an Ethernet frame?
Preamble: Syncronization
SDF: Start Frame Delimiter
Destination: Target MAC addy
Source: Source MAC addy
Type: describes if data is IPv4 or IPv6
Data
FCS: Frame Check Sequence
Half-Duplex
The device cannot send and receive at the same time.
Full-Duplex
The device can send and receive at the same time.
Ethernet link
Any physical cable between two Ethernet nodes.
MultiMode (MM)
SingleMode (SM)
Multi-Mode: fiber cable that allows for entry of multiple angles of light waves (LED).
Single-Mode: fiber cable that only tolerates light entering at a straight angle (laser).
Transceiver
Transmits and receives signals. Either a UTP port or a fiber-optic port.
What is HDLC?
High-Level Data Link Controller: it’s a data-link layer protocol used on lease lines (ISP WANs).
