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ZyAIR B-5000 User's Guide
28.6.1 TCP
Transmission Control Protocol is a connection-oriented transport service that ensures the reliability of
message delivery. It verifies that messages and data were received.
28.6.2 UDP
User Datagram Protocol (UDP) is a connectionless transport service that dispenses with the reliability
services provided by TCP. UDP gives applications a direct interface with the Internet Protocol (IP) and the
ability to address a particular application process running on a host via a port number without setting up a
connection session.
28.6.3 ICMP
Internet Control Message Protocol is a message control and error-reporting protocol between a host server
and a gateway to the Internet ICMP uses Internet Protocol (IP) datagrams, but the messages are processed by
the TCP/IP software and are not directly apparent to the application user.
28.6.4 IP
Internet Protocol (IP) is the underlying protocol for routing packets on the Internet and other TCP/IP-based
networks.
28.6.5 Configuring Firewall Access Control
Click FIREWALL and then ACCESS CONTROL to open the Firewall Config. – Access Control screen
(see Figure 28-6). Use this screen to enable firewall access control.
28-8
Firewall
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