EVB-PIC24 WIZnet, EVB-PIC24 Datasheet - Page 85

• Manufacturer Part Number: EVB-PIC24
• Description: Development Boards & Kits - PIC / DSPIC W3150A+EVAL BOARD BASED ON PIC24
• Manufacturer: WIZnet

Specifications of EVB-PIC24

• Rohs: yes
• Product: Development Kits
• Interface Type: RS-232
• Data Bus Width: 16 bit
• Dimensions: 50 mm x 40 mm

Header Section has fixed 12 Bytes length and the other 4 sections have variable lengths. Answer, Authority,
Additional Section other than Header and Question Section are called Resource Records(RRs). Each of
Header, Question, and RRs has different format.
QR
0
Opcode (4bit)
0
Resource Records(RRs)
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Variable Length
Variable Length
AA
<Fig 3.36: Question Section Format>
12 Bytes
<Fig 3.35: Header Section Format>
<Fig 3.34: DNS Message Format>
TC
QCLASS
QDCOUNT
ANCOUNT
NSCOUNT
ARCOUNT
QNAME
QTYPE
RD
7
ID
RA
8
Z (3bit)
Additional
Question
Authority
Answer
Header
RCODE (4bit)
15
Variable
Length
2 Bytes
2 Bytes
15
12 Bytes
75