Which IPv6 extension header types can Wireshark identify?

• A. Hop-by-Hop, Routing, Fragment, Destination
• B. TCP, UDP, ICMP
• C. TLS, SSL, SSH
• D. ARP, NDP

Answer: (A)

IPv6 uses optional extension headers to carry additional processing instructions between the sender and receiver. Wireshark can identify and dissect the standard extension header types that can appear after the IPv6 header: Hop-by-Hop Options, Routing, Fragment, and Destination Options. These headers are what follow the main IPv6 header and precede the upper-layer protocol, and Wireshark explicitly recognizes and shows the contents of each one when present.

Transport-layer protocols like TCP, UDP, and ICMP are not extension headers, so they are shown as their respective protocols rather than as IPv6 extension headers. TLS, SSL, and SSH are application-layer protocols, not extension headers either. ARP is used with IPv4, and Neighbor Discovery Protocol operates within ICMPv6, not as an IPv6 extension header.