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nslookup operates in interactive or non-interactive mode. When used interactively by invoking it without arguments or when the first argument is - (minus sign) and the second argument is a hostname or Internet address of a name server, the user issues parameter configurations or requests when presented with the nslookup prompt (>).
The following example uses getaddrinfo() to resolve the domain name www.example.com into its list of addresses and then calls getnameinfo() on each result to return the canonical name for the address. In general, this produces the original hostname, unless the particular address has multiple names, in which case the canonical name is returned ...
Multicast DNS (mDNS) is a computer networking protocol that resolves hostnames to IP addresses within small networks that do not include a local name server.It is a zero-configuration service, using essentially the same programming interfaces, packet formats and operating semantics as unicast Domain Name System (DNS).
This value is set by the originator of a query and copied into the response. This specification defines the behavior of standard queries and responses (opcode value of zero). Future specifications may define the use of other opcodes with LLMNR. C - Conflict. TC - TrunCation. T - Tentative. Z - Reserved for future use. RCODE - Response code.
Returns a 32-bit IPv4 address, ... For example, if there is both an A and an MX for a name, but the name server has only the A record cached, only the A record will ...
This is a list of the IP protocol numbers found in the field Protocol of the IPv4 header and the Next Header field of the IPv6 header.It is an identifier for the encapsulated protocol and determines the layout of the data that immediately follows the header.
It is important to note that this is the reverse order to the usual dotted-decimal convention for writing IPv4 addresses in textual form. For example, to do a reverse lookup of the IP address 8.8.4.4 the PTR record for the domain name 4.4.8.8.in-addr.arpa would be looked up, and found to point to dns.google.
EtherType value (hexadecimal) Protocol 0x0800: Internet Protocol version 4 (IPv4) 0x0806: Address Resolution Protocol (ARP) 0x0842: Wake-on-LAN [8] 0x22EA: Stream Reservation Protocol: 0x22F0: Audio Video Transport Protocol (AVTP) 0x22F3: IETF TRILL Protocol: 0x6002: DEC MOP RC 0x6003: DECnet Phase IV, DNA Routing 0x6004: DEC LAT: 0x8035 ...