MPC-PKT 1.lab

Which of the following best describes the role of ICMP in IP networks?

• A) Data encryption

• B) Error reporting and network diagnostics

• C) Reliable data transfer

• D) Resource management

Which utility uses ICMP echo requests and replies to test network connectivity?

• A) ping

• B) ipconfig

• C) nslookup

• D) telnet

Which ICMP message is sent when a packet’s Time-To-Live (TTL) value expires before reaching its destination?

• A) Echo Reply

• B) Destination Unreachable

• C) Time Exceeded

• D) Parameter Problem

What is the primary role of the Domain Name System (DNS) in a network?

• A) To filter unwanted domains

• B) To translate human-friendly domain names into IP addresses and vice versa

• C) To provide secure file transfers

• D) To manage routing tables of domains

Standard DNS queries ussualy use which transport protocol for initial resolution?

• A) TCP

• B) UDP

• C) ICMP

• D) HTTP

For which of the following applications is UDP most appropriate because it prioritizes low latency over reliability?

• A) File transfer applications

• B) Live video streaming

• C) Secure email transmission

• D) Web browsing

Which scenario is best suited for TCP’s reliable, connection-oriented communication?

• A) Real-time online gaming

• B) Voice over IP (VoIP) calls

• C) File transfers requiring error recovery

• D) Live video broadcasting

What is the primary function of Wireshark in network troubleshooting?

• A) To act as a network firewall

• B) To capture and analyze network traffic

• C) To encrypt communications

• D) To block unauthorized access

When a host needs to determine the MAC address corresponding to a known IP address, which ARP message does it send?

• A) ARP Reply

• B) ARP Query

• C) ARP Request

• D) ARP Require

While analyzing a network trace with Wireshark, you observe that a client initiates a DNS query using UDP, but the DNS response is sent over TCP. What is the most likely reason for this behavior?

• A) The DNS server is misconfigured to use TCP exclusively

• B) The DNS response exceeded the size limit for UDP

• C) The client prefers TCP for secure communications

• D) Network congestion forced a protocol switch