GSLC · Question #233
Which networking protocol is used to authenticate users or devices before granting them access to a network?
The correct answer is C. RADIUS. RADIUS is the standard protocol for centralized authentication, authorization, and accounting (AAA) for network access. It is used to verify users or devices before granting them network entry.
Question
Which networking protocol is used to authenticate users or devices before granting them access to a network?
Options
- AIPSec
- BPAgP
- CRADIUS
- DSRP
How the community answered
(31 responses)- A6% (2)
- B3% (1)
- C87% (27)
- D3% (1)
Why each option
RADIUS is the standard protocol for centralized authentication, authorization, and accounting (AAA) for network access. It is used to verify users or devices before granting them network entry.
IPSec is a suite of protocols for encrypting and securing IP communications in transit, not for authenticating users before granting network access.
PAgP (Port Aggregation Protocol) is a Cisco proprietary protocol used to negotiate EtherChannel link bundles, not for user or device authentication.
RADIUS (Remote Authentication Dial-In User Service) is specifically designed to authenticate users or devices seeking network access by forwarding credentials to a central authentication server. It operates over UDP and supports AAA services, making it the standard choice for network access control in enterprise environments such as Wi-Fi and VPN gateways.
SRP (Secure Remote Password) is a password-authenticated key exchange protocol and is not used as a network access authentication protocol in enterprise infrastructure.
Concept tested: RADIUS protocol for network access authentication
Source: https://www.cisco.com/c/en/us/support/docs/security-vpn/remote-authentication-dial-user-service-radius/12433-32.html
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