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Network+
Network Device's OSI Level
14
Computer Networking
Professional
05/17/2006
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Term
1. The Physical layer
 Definition
WAP

Hubs

Repeaters

NIC (NIC also belong to the Data Lnk Layer),

Cabling operate here
Term
2. The Data Link layer
 Definition
Switches (switching hubs) are similar to hubs, but they operate at the Data Link layer and create a dedicated connection between two hosts based on their Media Access Control (MAC) addresses.

Bridges are Data Link layer devices that join together different network segments.

NIC (NIC also belong to the Physical Layer)
Term
3. The Network layer
 Definition
Routers - are Network layer devices that connect network segments as well as different networks. Routers decide how to send packets to their ultimate destination.

A newer type of switch, called a Layer 3 Switch, combines the routing function of a router with the dedicated connection function of a
Term
WAP
 Definition
1. The Physical layer
Term
Hubs
 Definition
1. The Physical layer
Term
Repeaters
 Definition
1. The Physical layer
Term
NIC (NIC also belong to the Data Lnk
Layer),
 Definition
1. The Physical layer
Term
Network Cabling
 Definition
1 The Physical layer
Term
Switches
 Definition
2. The Data Link layer
Term
Bridges
 Definition
2. The Data Link layer
Term
NIC (NIC also belong to the Physical Layer)
 Definition
2. The Data Link layer
Term
Routers
 Definition
3. The Network layer
Term
Layer 3 Switch
 Definition
3 The Network layer
Term
Port #42
 Definition

Service Name 
namesrv

Service

Host Name Server
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