What is Cckm in WLC?
Cisco Centralized Key Management (CCKM) is a form of Fast Roaming and a subset of the Cisco Compatible EXtensions (CCX) specification. The user must authenticate with the Radius server the first time – then he can roam between access points using cached credentials.
What is CCKM in wireless?
Using Cisco Centralized Key Management (CCKM), an access point that is configured for wireless domain services (WDS) uses a fast rekeying technique that enables Cisco client devices to roam from one access point to another typically in under 150 milliseconds (ms).
What is fast roaming Cisco?
Fast roaming, also known as IEEE 802.11r or Fast BSS Transition (FT), allows a client device to roam quickly in environments implementing the WPA2 Enterprise security, by ensuring that the client device does not need to re-authenticate to the RADIUS server every time it roams from one access point to another.
Which four options are valid fast roaming techniques?
To consistently safeguard and ensure fast roaming, a network might also adopt any of the four following techniques: Pre-Master Key (PMK) Caching, Pre-Authentication, Opportunistic Key Caching (OKC) and the IEEE 802.11r standard.
What is OKC roaming?
OKC is a fast roaming technique supported by Microsoft and some Android clients. Another fast roaming method is the use of 802.11r, which is supported by Apple and few Andorid clients. OKC is enabled by default on a WLAN. This configuration enables the control of OKC on a WLAN.
What is the speed of WLAN data service?
It operates in both the 2.4 GHz and 5 GHz bands at a maximum data transfer rate of 600 Mbit/s. Most newer routers are dualband and able to utilize both wireless bands.
What is FT authentication?
Over-the-Air—The client communicates directly with the target AP using IEEE 802.11 authentication with the FT authentication algorithm. The communication between the client and the target AP is carried in FT action frames between the client and the current AP and is then sent through the controller.
Should I turn on fast roaming?
Thus, fast roaming should ALWAYS be enabled when you are using WPA2 Enterprise security. Therefore, to ensure maximum client compatibility, the common recommendation is to disable fast roaming when using WPA2 Personal, and only use it for WPA2 Enterprise networks.
What is PMK caching?
PMK caching allows the client to skip 802.1X authentication to any AP to which it has previously authenticated (only the 4-way handshake is required). PMK Caching is the method defined in the 802.11i specification, which also defined WPA2.
What is the 4 way handshake?
A four-way handshake is a type of network authentication protocol established by IEEE-802.11i that involves standards set up for the construction and use of wireless local area networks (WLANs). The four-way handshake provides a secure authentication strategy for data delivered through network architectures.
What is Pmksa?
The PMKSA stands for Pairwise Master Key Security Association – it is generated at the end of the EAP handshake (successful 802.1X negotiation) or when a PSK is configured. The PMKSA binds the PMK to a lifetime which can persist across multiple associations by a roaming Station.
What is the maximum speed of 802.11 ac?
The theoretical maximum 802.11ac speed is eight 160MHz 256-QAM channels which are each capable of 866.7 Mbps.
What is the password for Cisco routers?
Most routers and switches by Cisco have default passwords of admin or cisco, and default IP addresses of 192.168.1.1 or 192.168.1.254.
What is a Cisco wireless router?
Cisco Wireless Routers. Single-band routers only communicate over a single frequency band of 2.4 GHz . They share the same frequency with many home appliances, such as microwaves and Bluetooth hardware. A dual-band wireless router operates on a 2.4 Ghz and a 5 Ghz bands. They can support aggregate speeds of up to 2,167 Mbps or more.
What is umbrella roaming client?
Umbrella Roaming Client is a software program developed by OpenDNS . The most common release is 188.8.131.52, with over 98% of all installations currently using this version. Upon being installed, the software adds a Windows Service which is designed to run continuously in the background.
What is Cisco Internet?
Cisco Systems, Inc. is the worldwide leader in networking for the Internet. Today, networks are an essential part of business, education, government and home communications, and Cisco Internet Protocol-based (IP) networking solutions are the foundation of these networks.