TCP/IP Fundamentals Test

1. Which layer of the TCP/IP model is responsible for end-to-end communication and data flow control?

Internet Layer Transport Layer Network Access Layer Application Layer

2. What is the purpose of the TCP three-way handshake?

To establish a secure encrypted connection To negotiate the maximum segment size To establish a reliable connection before data transfer To synchronize sequence numbers

3. Which of the following is NOT a characteristic of UDP?

Guaranteed delivery Connectionless communication Lower overhead than TCP No guaranteed order of delivery

4. What well-known port number is used by HTTP?

21 25 443 80

5. In the TCP/IP model, which layer combines the OSI Application, Presentation, and Session layers?

Transport Layer Application Layer Internet Layer Network Access Layer

6. What is the purpose of the TTL (Time To Live) field in an IP packet?

To specify the packet priority To indicate the packet size To prevent packets from looping indefinitely To mark packets for QoS handling

7. Which protocol is used to resolve domain names to IP addresses?

DNS DHCP ARP ICMP

8. What is the main difference between TCP and UDP?

TCP is faster than UDP UDP is connection-oriented TCP does not use ports TCP provides reliable, ordered delivery; UDP does not

9. Which field in the TCP header is used to acknowledge received data?

Sequence Number Acknowledgment Number Checksum Window Size

10. What protocol is used to discover a device's MAC address given its IP address?

DNS DHCP ARP RARP