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Network access control is a computer networking solution that uses a set of protocols to define and implement a policy that describes how to secure access to network nodes by devices when they initially attempt to access the network. [3] NAC might integrate the automatic remediation process (fixing non-compliant nodes before allowing access ...
Network Admission Control (NAC) refers to Cisco's version of network access control, which restricts access to the network based on identity or security posture.When a network device (switch, router, wireless access point, DHCP server, etc.) is configured for NAC, it can force user or machine authentication prior to granting access to the network.
Once the 60-minute window expires, all network traffic is blocked. The user has the option of re-authenticating with Clean Access again, and continuing the process as needed. Systems passing the checks are granted access to the network as defined by the assigned role on the Clean Access Manager. Clean Access configurations vary from site to site.
Instead they use what is called a Network Access Code (NAC) which is included outside of the digital voice frame. This is a 12-bit code that prefixes every packet of data sent, including those carrying voice transmissions. The NAC is a feature similar to CTCSS or DCS for analog radios.
The authenticator is a network device that provides a data link between the client and the network and can allow or block network traffic between the two, such as an Ethernet switch or wireless access point; and the authentication server is typically a trusted server that can receive and respond to requests for network access, and can tell the ...
NAC—Network Access Control; NACK—Negative ACKnowledgement; NAK—Negative AcKnowledge Character; NaN—Not a Number; NAP—Network Access Protection; NAS—Network-Attached Storage; NASM—Netwide ASseMbler; NAT—Network Address Translation; NCP—NetWare Core Protocol; NCQ—Native Command Queuing; NCSA—National Center for ...
NAC: Network access control Link and other layers IEEE 802.1x: NAS: Network-attached storage Hardware / Storage Computer data storage: NAT: Network Address Translation Internet Layer Cisco Internet Protocol Journal: A look Inside Network Address Translators: NBMA: Non-Broadcast Multiple Access (e.g. Frame Relay ATM) Telecom
Free and open-source software portal; PacketFence is an open-source network access control (NAC) system that provides the following features: registration, detection of abnormal network activities, proactive vulnerability scans, isolation of problematic devices, remediation through a captive portal, 802.1X, wireless integration and User-Agent / DHCP fingerprinting.