Network Addressing

Correct Answer: The NIC is functioning correctly.

Pinging 127.0.0.1 is a basic network troubleshooting step. This IP address is also known as the loopback address. It is used to test the network interface card (NIC) and the TCP/IP stack of the device itself. If the ping is successful, it means the NIC and the TCP/IP stack are working properly The other options are incorrect because: - 'The router is functioning correctly.': The test does not involve a router so it cannot ascertain the router's functionality - 'The DNS server is functioning correctly.': The test does not involve DNS lookup as it is using the IP address directly, hence this does not validate the DNS server functionality - 'The DHCP server is functioning correctly.': The test has nothing to do with the DHCP server which is responsible for automatically allocating the IP addresses to devices on the network, it does not test its functionality.

Correct Answer: DHCP snooping

DHCP snooping is the correct protocol to enable on the DHCP server when you need to avoid IP conflicts during network configuration. DHCP snooping is a security feature that provides security to a network by preventing malicious or incorrect DHCP servers from assigning IP addresses. It works by filtering and controlling DHCP messages received from untrusted sources. DNS or Domain Name System is used for translating domain names to IP addresses, but doesn't directly handle IP assignment. NTP or Network Time Protocol provide time synchronization between computer systems over packet-switched, variable-latency data networks - it isn't related to IP addressing. FTP or File Transfer Protocol is for transferring files from one host to another over a TCP-based network, such as the Internet - again, not related to IP addressing.

Correct Answer: Implement VLANs to segment the network.

The most effective solution to mitigate the issue of high amount of broadcast traffic on a switch is to 'Implement VLANs to segment the network'. This is because VLANs (Virtual Local Area Networks) are effective in reducing broadcast traffic by breaking up the network into smaller logical networks. Each VLAN is a separate broadcast domain, so broadcast traffic is limited only to that particular VLAN, and doesn't impact other VLANs. The other options do not directly address the issue of high broadcast traffic. 'Configure port security' mainly protects the network from unauthorized access, not from broadcast traffic. 'Disable unused switchports' can provide minor alleviation of broadcast traffic, but not to the extent VLANs can. 'Install a firewall' primarily protects the network from external threats, but won't significantly reduce internal broadcast traffic intensive scenarios.