What is the protocol of choice for network device access control?
- RADIUS
- SSHv2
- Telnet
- TACACS+
Explanation: TACACS+ is preferred for device access control because it can individually authorize every command that a user tries to execute after logging in to a device. In contrast, RADIUS requires those commands to be sent in the initial authentication response, and because there could be thousands of CLI command combinations, a large authorization result list could trigger memory exhaustion on the network device.
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