Cisco 8800 Series, Manual

Page: 469 / 544

Usage notes Purpose Network protocol
Cisco IP Phones use the HTTP protocol for
XML services, provisioning the phone,
upgrading the phone, and for
troubleshooting purposes. HTTP is the standard way of transferring
information and moving documents across
the Internet and the web. Hypertext Transfer Protocol (HTTP)
Some Web applications support both HTTP
and HTTPS protocols. Cisco IP Phones that
support HTTPS use the HTTPS URL. 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. Hypertext Transfer Protocol Secure
(HTTPS)
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 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.
IEEE 802.1X
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.
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.
IEEE 802.11n/802.11ac
To communicate using IP, network devices
must have an assigned IP address, subnet,
and gateway.
IP addresses, subnets, and gateway
identifications are automatically assigned
if you are using the Cisco IP Phone with
Dynamic Host Configuration Protocol
(DHCP). If you are not using DHCP, you
must manually assign these properties to
each phone locally.
IP is a messaging protocol that addresses
and sends packets across the network. Internet Protocol (IP)
The Cisco IP Phone supports LLDP on the
PC port. LLDP is a standardized network discovery
protocol (similar to CDP) that is supported
on some Cisco and third-party devices. Link Layer Discovery Protocol (LLDP)
Cisco IP Phone 8800 Series Multiplatform Phone Administration Guide for Release 11.3(1) and Later
449
Technical Details
Technical Details