What is the purpose of the Checksum field in the UDP header?
The UDP checksum computes a 16-bit one's complement sum covering the UDP header, payload, and a pseudo-header containing source/destination IPs to catch delivery errors.
In an IPv4 packet, if the Total Length field is 1200 bytes and the Header Length (HLEN) field is 5, which payload size is correct?
HLEN = 5 represents a 20-byte IPv4 header. Payload = 1200 - 20 = 1180 bytes. Since 1180 is not listed in A-C, None of the above is correct.
What type of routing protocol uses link metrics like bandwidth, delay, reliability, and MTU rather than simple hop counts?
Cisco's Enhanced Interior Gateway Routing Protocol (EIGRP) uses composite metrics based on bandwidth, delay, reliability, load, and MTU.
Which protocol is utilized to resolve an IPv6 address to a link-layer MAC address, replacing legacy ARP?
In IPv6, Neighbor Discovery Protocol (NDP) running over ICMPv6 handles address resolution using Neighbor Solicitation and Neighbor Advertisement messages.
What is the maximum distance supported by a standard 1000BASE-T Gigabit Ethernet connection over Category 5e unshielded twisted pair copper cabling?
IEEE 802.3ab specifies a maximum horizontal cabling channel run of 100 meters (90 meters solid horizontal cabling + 10 meters stranded patch cords).