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:
• Routing Information Protocol (RIP), Open Shortest Path First (OSPF), and Routing Convergence
• TCP/IP Protocol Suite
• Dynamic Host Configuration Protocol (DHCP) Explained
• IPv4 Datagram Fields
• Representation of IPv6 Addresses
• IGRP (Interior Gateway Routing Protocol)
• Basic TCP/IP Networking
• 14 Common Network Ports You Should Know
• Comparing IPv4 and IPv6 at a Glance
• DSL (Digital Subscriber Line)
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