Which of the following could provide a lightweight and private connection to a remote box?
Answer(s): D
Secure Shell (SSH) is a clientserver protocol that provides an encrypted, authenticated channel over an insecure network.Because it operates at the application layer over a single TCP connection (by default on port 22), SSH avoids the complexity and overhead of a full VPN while still preventing eavesdropping, tampering, and impersonation.
Which of the following routing protocols is most commonly used to interconnect WANs?
Answer(s): C
BGP is the de facto exterior gateway protocol used to exchange routing information between autonomous systems and is most commonly deployed for WAN interconnections.
A server administrator deploys a new web server with an IP address of 192.168.16.100. The security policy dictates that all non-secure connection methods should be blocked.Which of the following security rules will satisfy the request without prohibiting other traffic?
Denying TCP port 80 specifically for 192.168.16.100 blocks unencrypted HTTP while permitting all other traffic - including HTTPS on port 443 - so secure connections remain allowed.
Which of the following protocol ports should be used to securely transfer a file?
Answer(s): A
Port 22 is the default for SSH-based file transfers (SFTP/SCP), which encrypt data in transit for secure file transfer.
A company reports that their facsimile machine no longer has a dial tone when trying to send a fax. The phone cable is damaged on one end.Which of the following types of connectors should a technician replace?
The RJ11 connector is the standard six-position, two- or four-wire jack used for analog telephone lines, which supply the dial tone and audio signaling a fax machine requires. Replacing the damaged RJ11 plug restores the physical connection to the PSTN line so the fax can send and receive properly.
A network technician is installing a new switch that does not support STP at the access layer of a network. The technician wants a redundant connection to the distribution switch.Which of the following should the technician use?
Link aggregation bundles multiple physical ports into one logical link, providing fault tolerance and increased bandwidth without creating spanning-tree loops on an STP-unsupported switch.
A company recently rearranged some users' workspaces and moved several users to previously used workspaces. The network administrator receives a report that all of the users who were moved are having connectivity issues.Which of the following is the most likely reason?
The relocated workstations landed on switch ports still configured as trunks, so their untagged client traffic wasn't placed into the proper access VLAN. Reverting those ports to access mode restores connectivity.
A newly opened retail shop uses a combination of new tablets, PCs, printers, and legacy card readers.Which of the following wireless encryption types is the most secure and compatible?
WPA2/WPA3 mixed mode lets devices that support WPA3 use its stronger encryption while still allowing legacy devices that only support WPA2 to connect, balancing security with compatibility.
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