100-160 Question 63
Select 2A user reports that they are unable to access a specific website. As part of your troubleshooting, you decide to check the network connectivity and resolve the domain name of the website. Which of the following protocols would you use to verify connectivity and domain name resolution?
- A
ICMP
- B
DNS
- C
ARP
- D
HTTP
- E
DHCP
Show answer and explanation
Correct answers: A, B
Explanation
To troubleshoot a website access issue, you need to verify both network connectivity and domain name resolution. ICMP can be used to check if the destination host is reachable, while DNS is used to resolve the website's domain name to its IP address, ensuring the browser can locate the correct server.
- A. Correct.
ICMP (Internet Control Message Protocol) is used to verify network connectivity, typically through tools like ping, which checks if the destination host is reachable.
- B. Correct.
DNS (Domain Name System) is responsible for resolving domain names to IP addresses, which is necessary for accessing websites.
- C. Incorrect.
ARP (Address Resolution Protocol) is used for resolving IP addresses to MAC addresses within the same local network, but it is not relevant for troubleshooting website access issues.
- D. Incorrect.
HTTP (Hypertext Transfer Protocol) is used for transferring website data between servers and browsers, but it is not a diagnostic protocol for checking connectivity or domain name resolution.
- E. Incorrect.
DHCP (Dynamic Host Configuration Protocol) is used to assign IP addresses to devices on a network, but it is unrelated to verifying connectivity or resolving domain names.