Exam 220-1101 topic 1 question 39 discussion

Sysadmin/netadmin (also Cisco CCNP, CCSI) w 25 years' field experience here. It's A. The first thing we ALWAYS check (besides "is it plugged in, is it turned on") when troubleshooting network connectivity is "does it have an IP address/did it get a DHCP lease?". The question does not say you're pinging by name, so DNS is NOT the first thing to check. Now, if we can ping by IP and NOT ping by name, then definitely we'd be checking DNS.

I took the exam and this exact question was on it, and I did not miss any questions in networking or network troubleshooting. DHCP is the correct answer.

DHCP is responsible for leasing out IP addresses.

A. DHCP maybe is assign IPIPA 169.254.x.y

DHCP= Dynamic Host Control protocol

The network administrator should check DNS first. If laptop users are unable to access or ping any network resources, it could be due to a DNS resolution issue. DNS maps domain names to IP addresses, and if DNS is not functioning correctly, the laptops will not be able to resolve the IP addresses of the network resources.

A is the correct answer here, gotta pay attention to the details of the question. Users can not access or ping any network resources. If they were able to ping IP addresses, the question would've stated that. The fact they cant ping anything tells you it's a DHCP issue.

DHCP is correct. DHCP is a network protocol that automatically assigns end devices an IO address. DNS is only focused on converting hostnames to IP addresses like google.com to 8.8.8.8.

DNS is responsible for resolving domain names into IP addresses that can be used by the devices on the network to communicate with each other. If the laptop users are unable to access or ping any network resources, it could be because the DNS server is not responding or is not properly configured. This can cause the laptops to be unable to resolve the IP addresses of the network resources they are trying to connect to, resulting in communication failure. Therefore, the network administrator should check the DNS server and ensure that it is properly configured and responding.

I'm going for C, DNS, the user is not able to you network resourse's therefore DHCP cant be right since your are able to access network resources even if there is a DHCP issue.

The first thing that the network administrator should check in this scenario is the DNS (Domain Name System) configuration. Option C is the correct answer. DNS is responsible for resolving hostnames to IP addresses, which is necessary for clients to access network resources by name. If DNS is not functioning correctly, clients will be unable to access resources using hostname or fully qualified domain name (FQDN). This can also lead to issues with pinging network resources by name. DHCP (Dynamic Host Configuration Protocol) is responsible for automatically assigning IP addresses to network clients, so it can be checked next after DNS. AAA (Authentication, Authorization, and Accounting) is used for network security purposes and is less likely to be the cause of network connectivity issues. ARP (Address Resolution Protocol) is used for resolving IP addresses to MAC addresses and would not be the first thing to check in this scenario.

Shouldn't it be DNS?

Domain Name System (DNS) is an Internet service that translates domain names (e.g., its.umich.edu) into IP addresses. Dynamic Host Configuration Protocol (DHCP) is a protocol for automatically assigning IP addresses and other configurations to devices when they connect to a network.

DHCP is the correct answer

DHCP is the correct answer.

a is correct DHCP

ARP seems correct