Addressing

Correct Answer: Layer 3 switch or Router

The correct answer is 'Layer 3 switch or Router'. A VLAN (Virtual Local Area Network) is a way to group together devices on separate physical networks so they can communicate as if they were on the same network. This helps to increase the efficiency and security of the network. However, while devices on the same VLAN can communicate directly, communication between different VLANs needs to pass through a router or a Layer 3 switch. This is because routers and Layer 3 switches operate at the Network Layer (Layer 3) of the OSI model and have the ability to forward packets based on IP addresses. Contrarily, Layer 2 switches, hubs, and firewalls would not facilitate communication between different VLANs. A Layer 2 switch operates at the Data Link Layer and forwards packets based on MAC addresses not by IP addresses, hence devices on different VLANs would not be able to communicate. A Hub is a simple device that doesn't have the ability to segregate or route traffic, while a Firewall is designed for controlling and monitoring traffic to prevent unauthorized access to or from a network and wouldn't enable inter-VLAN communication.

Correct Answer: Assign unique IP addresses to each host

The most appropriate method to resolve the conflict of two hosts using the same IP address in a network environment is to assign unique IP addresses to each host. Every device in the network needs to have a unique IP address to communicate correctly without interference or conflict. The other offered suggestions are incorrect because enabling STP (Spanning Tree Protocol) on both hosts does not resolve IP conflicts; it prevents network loops. Disabling DHCP (Dynamic Host Configuration Protocol) on the conflicting hosts is not a solution; it helps manage IP address assignment but disabling it will not resolve the current IP conflict. Changing the default gateway addresses will not solve the IP conflict between the hosts, as the gateway is not directly involved in this situation.

Correct Answer: fc00::/7

The IPv6 address that is uniquely local and cannot be routed outside the local network is fc00::/7. These addresses can be used for private networking and are not routable on the global IPv6 Internet, similar to IPv4 private addresses like 192.168.0.0/16. On the other hand, the addresses 2001::/3 and 2000::/3 are global unicast addresses that are routable on the global IPv6 Internet. Lastly, the address fe80::/10 is a link-local address that is only valid and routable on the local network segment, but unlike fc00::/7, it is automatically assigned and typically managed by the operating system or networking hardware.