Chapter 5 Ethernet (802.3) Switched LANs

4. Know the difference between: a) Workgroup switch b) Core switch.

4a) Switches connect users to the network. Workgroup. 4b) Type of switch connects switches to other switches

5b) Trunk links connect switches to _______________switches. A) Core B) Workgroup C) Both A and B D) Neither A nor B

A ; Core

9. virtual LANs (VLANs)

A closed collection of servers and the clients they serve. Broadcast signals go only to computers in the same VLAN.

10. EUI-48 address

A common data link address format with a ength of 48 bits. Formerly called a MAC address.

4. Switches

A device that forwards frames within a single network

3. Frames

A message at the data link layer. 2) In time division multiplexing, a brief time period, which is further subdivided into slots.

1. Local Area Network (LAN)

A network within a customer's premises.

5. clock cycle

A period of time during which a transmission line's state is held constant.

7. full-duplex transmission

A type of communication that supports simultaneous two-way transmission. Almost all communication systems today are full-duplex systems

6. Know the difference between binary and digital signaling.

Binary signaling, there are two possible states. Digital signaling, there are a few possible states.

MAC address

Former name for EUI-48 address.

3. What agency makes Ethernet standards?

IEEE

Why does multimode fiber dominate LAN installations?

It is less expensive and carries signals far enough for LAN trunk lines.

7. What advantages do fiber optic cables offer over twisted pair cables and other media choices?

Much higher transmission speeds Less signal degradation over distance Not susceptible to EMI

2. What agency makes LAN standards?

OSI standards are dominant at Layers 1 and 2, so Ethernet standards are OSI standards. They are created by the IEEE and later ratified by ISO .

9. Know the security benefit of Ethernet VLANs.

Segments the network so that hosts that are not permitted by policy to communicate cannot communicate.

8. Know the difference between single-mode and multi-mode.

Single-mode fiber carries signals farther but is more expensive.

2. Ethernet

Switched network standard; dominates in LANs; also used in WANs. Standardized by the IEEE 802.3 Working Group.

6. RJ-45 connectors

The connector at the end of a UTP cord, which plugs into an RJ-45 jack.

8. bonding

The use of two or more trunk links between a pair of switches; also known as trunking or bonding.

5a) Are access links wired or wireless?

They can be either.

1. Know Ethernet characteristics

a. Single-network standard b. Governed by physical and data link layer standards c. Messages known as frames d. Forwarding devices known as switches e. Path that a frame travels through the Ethernet is a data link f. Transmission links that connect pairs of devices are physical links g. Ethernet signaling govern physical layer transmission