CCST Networking Fundamentals 5

Question 1

Which protocol is used to securely manage network devices remotely over an encrypted connection?

Accepted Answer

SSH

Answer

SSH (Secure Shell) encrypts the management session between the administrator and the network device, replacing insecure Telnet.

Question 2

What does 'half-duplex' mean in the context of network communication?

Accepted Answer

Data can flow in only one direction at a time

Answer

Half-duplex allows data to travel in both directions but not at the same time — one side must finish transmitting before the other can send.

Question 3

Which private IP address range is defined by RFC 1918 for Class A networks?

Accepted Answer

10.0.0.0 – 10.255.255.255

Answer

RFC 1918 reserves 10.0.0.0/8 for Class A private use, providing over 16 million host addresses within a single organization.

Question 4

What is the primary purpose of NAT (Network Address Translation)?

Accepted Answer

Allow multiple private IP devices to share one public IP address

Answer

NAT allows devices with private IP addresses to access the internet by translating their addresses to one or more public IP addresses at the router.

Question 5

Which Ethernet frame field is used to detect transmission errors?

Accepted Answer

FCS (Frame Check Sequence)

Answer

The FCS field contains a CRC value calculated by the sender; the receiver recalculates and compares it to detect bit errors in the frame.

(CCST) Cisco Certified Support Technician Networking Practice Test