Computer Network Switches
By Stephen Bucaro
A bridge or router may be referred to as a "switch" because it uses information in the
data packet to choose a path from one network segment to another. A bridge may be referred to
as a "layer 2 switch" because it uses information from layer 2, the Data Link layer of
the OSI model. A router may be referred to as a "layer 3 switch" because it uses information
from layer 3, the Network layer of the OSI model. A network device that uses a higher layer of
the OSI model may be referred to as a "layer 4 switch", and so on.
More Networking Protocols and Standards:
• Network Routing Protocols - IGRP, EIGRP, OSPF, ISIS, BGP
• SYN-ACK Handshake to Establish a TCP Connection
• IPv6 Global Unicast Addresses
• IPv6 Unicast Addresses
• DSL (Digital Subscriber Line)
• IP Addressing and Subnetting
• Wireless Network Standards - 80211a, 80211b, 80211g, 80211n, 80216
• IPv4 Datagram Fields
• Video - Introducing the OSI Model
• What Are Private IP Addresses?
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