Explore Network Access Control Technology Definition, Functions, Benefits and Types as computer network security technology
What is NAC or Network Access Control
Network troubleshooting is the process of identifying, diagnosing, and repairing problems that occur in a computer network. The main goal of network troubleshooting is to restore normal network performance and ensure stable connectivity between devices and systems on the network.
Network troubleshooting is the process of identifying, diagnosing, and repairing problems that occur in a computer network. The main goal of network troubleshooting is to restore normal network performance and ensure stable connectivity between devices and systems on the network. In its implementation, Network troubleshooting focuses on solving problems and optimizing the performance of a computer network, while the task of managing, controlling and providing access to security layers is the task of Network Access Control (NAC). Network Access Control (NAC) is a network access security control technology by applying policies to devices that access the network. Network Access Control works on its security layer. Both Network troubleshooting and Network Access Control (NAC) work together to support the creation of a network that runs well and is safe.
Network Access Control (NAC) is
Network Access Control Function
The main functions of Network Access Control are as follows:
Identification and Authentication
NAC ensures that users or devices wishing to access the network are properly identified and have valid authentication credentials. This involves logging in and authenticating users using methods such as usernames and passwords, digital certificates, or other authentication mechanisms.
Device Security
NAC checks devices for compliance with established security policies before granting access to the network. This includes verifying whether the device has the latest security updates, active antivirus software, enabled firewall, or other compliance with specified policies.
Access Control
NAC allows network administrators to organize and control the level of access granted to devices and users. This includes restricting access based on time, location, device type, or user role in the organization.
Network Monitoring
NAC can provide visibility and monitoring of devices connected to the network. This allows network administrators to identify unauthorized or potentially malicious devices, as well as monitor suspicious network activity.
The benefits of implementing Network Access Control include improving network security by controlling incoming access to the network, increasing compliance with security policies, and increasing network administration efficiency with better automation and monitoring settings.
Also Read : Network Troubleshooting
Advantages and Disadvantages of Network Access Control
In carrying out work in securing computer networks, Network Access Control has several advantages and disadvantages, including:
Excess
Security Improvements
One of the main advantages of NAC is that it improves overall network security. By checking and validating the identity of devices and users before granting access, NAC can prevent unauthorized or malicious devices from connecting to the network. This helps reduce the risk of external attacks and protects sensitive network resources.
Security Policy Compliance
NAC enables organizations to establish and enforce consistent security policies across the network. By verifying device compliance with established policies, NAC ensures that all connected devices meet established security standards. This helps organizations maintain compliance with applicable regulations and security standards.
Better Access Control
NAC provides more granular and more effective access control. Network administrators can determine and manage the level of access granted to users and devices based on factors such as user role, location, time of day, and device compliance. This allows more precise access policies to be set, thereby minimizing the risk of unauthorized or unauthorized access.
Lack
Implementation Complexity
Implementing NAC can be a complex process and requires careful planning. Configuring and deploying NAC can be complex, especially in existing network environments. It requires a deep understanding of network infrastructure and appropriate security policies to optimize NAC implementation.
Cost
Implementing NAC can involve significant costs. This includes the cost of NAC hardware and software, staff training, and maintenance costs. Also, NAC requires network devices that support the NAC protocol, which may require upgrading or replacing existing devices.
Effect on Network Performance
The use of NAC can affect network performance. Checking and verifying device and user identity can introduce latency into the authentication process, especially on busy networks. Improper use of NAC or inefficient configuration can also affect network throughput and responsiveness.
Also Read : Computer Network Components
Types of Network Access Control
There are several types of Network Access Control (NAC) that are commonly used. Here are some popular types of NAC:
Endpoint-Based NAC
Endpoint-based NAC involves deploying client software on every device connected to the network. This software is responsible for securing devices and verifying compliance with network policies before granting access.
Network-Based NAC
Network-based NAC relies on hardware or software placed on the network to control access. This could be a switch, router, or firewall that has the ability to perform device identity checks and set access policies.
Identity-Based NAC
Identity-based NAC focuses on verifying and authenticating users before granting access to the network. This involves using protocols such as RADIUS (Remote Authentication Dial-In User Service) or TACACS+ (Terminal Access Controller Access-Control System Plus) to authenticate users before granting access.
Role-Based NAC
Role-based NAC organizes access based on user roles or categories. Each user is assigned a specific role that determines the level of access they have to network resources. This helps in managing access policies more efficiently.
Guest Access NAC
Guest access NAC is designed to manage the access of guest users connected to the network. This allows organizations to provide limited access to visitors or temporary users without compromising network security that is generally enforced on internal users.
Wireless NAC
Wireless NAC is used to secure wireless network access. This involves authenticating wireless devices and checking compliance before granting access to the network.
Cloud-Based NAC
Cloud-based NAC involves the use of cloud services to manage and control network access. This enables the use of NAC without the need for local hardware or software, and provides greater flexibility and scalability.
Each type of NAC has advantages and limitations that must be considered depending on the specific needs and network environment.
Source
https://www.cisco.com/c/en/us/products/security/what-is-network-access-control-nac.html
Author: Hassan Rizky Putra S | Editor : Meilina Eka Ayuningtyas
