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200-150 · Question #195

Refer to the exhibit. Which host can securely to the switch by using SSH?

The correct answer is A. 10.1.15. SSH access to a Cisco switch is restricted by an access-class ACL applied to the VTY lines, permitting only hosts in a specified IP range.

Cisco Data Center Network Services

Question

Refer to the exhibit. Which host can securely to the switch by using SSH?

Exhibit

200-150 question #195 exhibit

Options

  • A10.1.15
  • B10.200.200.1
  • C10.2.1.1
  • D10.9.1.2

How the community answered

(37 responses)
  • A
    78% (29)
  • B
    11% (4)
  • C
    8% (3)
  • D
    3% (1)

Why each option

SSH access to a Cisco switch is restricted by an access-class ACL applied to the VTY lines, permitting only hosts in a specified IP range.

A10.1.15Correct

Host 10.1.1.5 matches the permit statement in the access control list applied to the VTY lines via the access-class command. Only hosts whose source IP addresses fall within the permitted range defined in that ACL are allowed to establish SSH sessions to the switch, and 10.1.1.5 is the only listed host within that permitted subnet.

B10.200.200.1

Host 10.200.200.1 does not match the permitted IP range in the VTY access-class ACL, so its SSH connection attempts are implicitly denied.

C10.2.1.1

Host 10.2.1.1 falls outside the permitted subnet defined in the access-class ACL applied to the VTY lines and is therefore blocked.

D10.9.1.2

Host 10.9.1.2 is not included in the permitted source IP range configured in the VTY line access-class, so SSH is denied.

Concept tested: SSH VTY access restriction via access-class ACL

Source: https://www.cisco.com/c/en/us/support/docs/security-vpn/secure-shell-ssh/4145-ssh.html

Topics

#SSH#access control#management plane security#ACL

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