Cisco Ip Phone 8800 Series Multiplatform Phones Administration Guide - Cisco 8851 Administration Manual

Network protocol
Dynamic Host Configuration
Protocol (DHCP)
Hypertext Transfer Protocol
(HTTP)
Hypertext Transfer Protocol
Secure (HTTPS)
IEEE 802.1X
IEEE 802.11n/802.11ac
Purpose
DHCP dynamically allocates and assigns an IP address to
network devices.
DHCP enables you to connect an IP phone into the network
and the phone to become operational without the need to
manually assign an IP address or to configure additional
network parameters.
HTTP is the standard way of transferring information and
moving documents across the Internet and the web.
Hypertext Transfer Protocol Secure (HTTPS) is a combination
of the Hypertext Transfer Protocol with the SSL/TLS protocol
to provide encryption and secure identification of servers.
The IEEE 802.1X standard defines a client-server-based
access control and authentication protocol that restricts
unauthorized clients from connecting to a LAN through
publicly accessible ports.
Until the client is authenticated, 802.1X access control allows
only Extensible Authentication Protocol over LAN (EAPOL)
traffic through the port to which the client is connected. After
authentication is successful, normal traffic can pass through
the port.
The IEEE 802.11 standard specifies how devices
communication over a wireless local area network (WLAN).
802.11n operates at the 2.4 GHz and 5 GHz band and
802.11ac operates at the 5 GHz band.

Cisco IP Phone 8800 Series Multiplatform Phones Administration Guide

Network Protocols
Usage notes
DHCP is enabled by default. If
disabled, you must manually
configure the IP address, subnet
mask, and gateway on each phone
locally.
If you cannot use option
Note
150, you may try using
DHCP option 66, 159, or
160.
Cisco IP Phones use HTTP for
XML services, provisioning,
upgrade and for troubleshooting
purposes.
Web applications with both HTTP
and HTTPS support have two
URLs configured. Cisco IP Phones
that support HTTPS choose the
HTTPS URL.
The Cisco IP Phone implements
the IEEE 802.1X standard by
providing support for the following
authentication methods:
EAP-FAST, and EAP-TLS.
When 802.1X authentication is
enabled on the phone, you should
disable the PC port and voice
VLAN.
The 802.11 interface is a
deployment option for cases when
Ethernet cabling is unavailable or
undesirable.
Only Cisco IP Phone 8861 and
8865 support WLAN.
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