answer:A router in the path to the destination device would drop the packet **when the value of the Hop Limit field reaches zero**. In IPv6, the Hop Limit field serves a similar purpose to the Time To Live (TTL) field in IPv4, decrementing by one by each router that forwards the packet. When the Hop Limit reaches zero, the packet is discarded to prevent it from cycling endlessly through the network, and the router typically sends an ICMPv6 Time Exceeded message back to the source.

answer:The code of 2 in the context of ICMP (Internet Control Message Protocol) responses typically represents "Protocol unreachable." This means that the destination host was reached, but the protocol specified in the packet's header is not supported or not available on the target host. However, it's important to note that the specific meaning of any given code can depend on the type of ICMP message it's associated with. In response to a ping (which is an ICMP echo request), receiving a code that directly correlates with "Protocol unreachable" would be unusual, as ping commands don't specify a protocol like TCP or UDP that could be "unreachable" in the same sense as a port. The typical ICMP codes for a Destination Unreachable message are: - 0: Network Unreachable - 1: Host Unreachable - 2: Protocol Unreachable - 3: Port Unreachable - And so on, for different scenarios. Given this, the correct context around "code of 2" might slightly differ based on what exact response or situation is occurring, but based on standard ICMP definitions, "2" would indicate "Protocol unreachable" under the umbrella of a Destination Unreachable message type. However, receiving such a specific code in response to a ping command directly indicating "Protocol unreachable" might require review in the context or specifics of how the ping and ICMP response were interpreted. In general practice, ICMP codes like "network unreachable," "host unreachable," or "port unreachable" are more commonly encountered with diagnostic tools usage like ping or traceroute.

answer:The prompt **Router#** indicates that you are in **privileged EXEC mode** on a Cisco IOS device. This mode allows you to view and change the configuration of the router. It provides access to a broad set of commands and is more powerful than user EXEC mode, which is indicated by a prompt ending in ">" (e.g., Router>).

answer:A network administrator would use the **show interfaces** command to determine if there are encapsulation or media errors on an interface. This command displays detailed information about the router's interfaces, including their physical and data link layer status, packet statistics, and any errors such as CRC errors, frame errors, or other issues that might indicate problems with the interface's performance or connection.