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IPv4 has been in use since 1983 when it was deployed on the Advanced Research Projects Agency Network (ARPANET), which was the precursor to the Internet. The Internet is largely based on IPv4, which is still the most widely-used network layer protocol. An IPv4 packet has two parts:
As shown in the figure, an IPv4 packet header consists of fields containing important information about the packet. These fields contain binary numbers which are examined by the Layer 3 process. The binary values of each field identify various settings of the IP packet. Significant fields in the IPv4 header include:
The two most commonly referenced fields are the source and destination IP addresses. These fields identify where the packet is from and where it is going. Typically these addresses do not change while travelling from the source to the destination. Jun 14, 2022 Last Updated: Jun 14, 2022 CyberOps Associate 1. What are the two most commonly referenced fields in an IPv4 packet header that indicate where the packet is coming from and where it is going? (Choose two.)
Explanation: The IP header fields that identify where the packet originated and where it is going are Source IP Address and Destination IP Address. 2. Which statement is correct about IPv4 packet header fields?
Explanation: The source and destination IP addresses in the IP packet do not change in route from source to destination. 3. Which field is used to detect corruption in the IPv4 header?
Explanation: The Header Checksum field in an IPv4 header is used to detect corrupt packets. 4. Which field includes common values such as ICMP (1), TCP (6), and UDP (17)?
Explanation: The protocol field identifies the upper layer protocol that is carried inside the IP packet. Common protocols are TCP, UDP, and ICMP. Would love your thoughts, please comment.x ← 6.2.7 Check Your Understanding – IP Characteristics Answers ← 6.3.7 Check Your Understanding – IPv4 Address Structure Answers |