Network Troubleshooting

A network technician is troubleshooting an issue where a dual-stack client workstation fails to connect to an internal host named `app-server.corp.local` over IPv6. The technician runs `nslookup -type=AAAA app-server.corp.local` and receives a response stating that the domain name does not exist. However, executing `nslookup app-server.corp.local` successfully returns the IPv4 address $10.1.10.45$. Which of the following is the most likely cause of this issue?

Following an office wall installation project, a workstation loses network access. A network technician suspects that a 120-meter Category 6 unshielded twisted-pair (UTP) cable running through the wall cavity has been physically severed by a drywall fastener. Which diagnostic tool should the technician use to determine the exact distance along the cable run to the location of the break?

A desktop technician is systematically troubleshooting a workstation on a newly configured subnet ($10.80.12.0/24$) that cannot access network resources. The workstation failed to acquire a lease from the enterprise DHCP server located on a separate server subnet ($10.10.2.0/24$). Following standard troubleshooting methodology from the local client to the centralized infrastructure, in what order should the technician perform these diagnostic and verification steps?

A network administrator receives alerts that newly deployed IP security cameras in a logistics facility are unable to communicate with the central surveillance management server. Examination of a affected camera's network configuration reveals an IP address of $192.168.1.105$ with a default gateway of $192.168.1.1$. However, the camera VLAN is defined as $10.120.45.0/24$ with leases managed by a central enterprise DHCP server at $10.100.10.50$. Which of the following is the most likely cause of this issue?

A network engineer is deploying new point-of-sale (POS) terminals on VLAN 105 ($192.168.105.0/24$). The enterprise central DHCP server resides on VLAN 10 ($10.10.10.2$). During initial testing, the POS terminals fail to obtain leased IP addresses and continuously self-assign IP addresses in the range of $169.254.1.1$ through $169.254.254.254$. Which of the following potential root causes or diagnostic actions should the engineer investigate to resolve this connectivity issue? (Select TWO.)

Match each physical layer cabling fault or task scenario with the diagnostic tool or equipment best suited to identify or resolve it.