Practice Test Geeks(CCST) Cisco Certified Support Technician Networking Practice Test
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Network Services & Protocols Flashcards

7 cards from real CCST practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

Read the first 7 Network Services & Protocols flashcards as text

  1. What is PAT (Port Address Translation), also known as NAT Overload?

    Answer: A type of NAT that maps multiple private IP addresses to a single public IP using unique port numbers

    PAT (NAT Overload) allows many internal hosts to share a single public IP address by using unique source port numbers to track each individual session.

  2. What does ICMP stand for, and what is it primarily used for?

    Answer: Internet Control Message Protocol — used to send error messages and operational information about network conditions

    ICMP (Internet Control Message Protocol) is used by network devices to send error messages and diagnostics; the ping and traceroute utilities rely on ICMP.

  3. Which protocol is used to transfer Cisco IOS images and configuration files to and from a router or switch using a simple, lightweight file transfer mechanism?

    Answer: TFTP

    TFTP (Trivial File Transfer Protocol) is a simple, connectionless UDP-based file transfer protocol commonly used to transfer IOS images and configuration files to Cisco devices.

  4. What is the purpose of Syslog in a network environment?

    Answer: To collect and store log messages from network devices for monitoring and troubleshooting

    Syslog is a standard protocol used to send system log messages from network devices to a centralized syslog server, enabling monitoring, auditing, and troubleshooting.

  5. Which DNS record type is used for reverse DNS lookups, mapping an IP address back to a hostname?

    Answer: PTR

    PTR (Pointer) records are used in reverse DNS zones to map an IP address to a fully qualified domain name, the opposite of an A record.

  6. What is a DHCP scope?

    Answer: The range of IP addresses a DHCP server can assign to clients

    A DHCP scope is the defined range (pool) of IP addresses that a DHCP server is configured to allocate to clients on a specific subnet.

  7. What well-known port does FTP use for control (command) connections?

    Answer: 21

    FTP uses TCP port 21 for the control connection (commands and responses) and TCP port 20 for active-mode data transfers.