mDNS packets

1
mDNS packets

• Measured number of multicast DNS (mDNS) packets
  during weekdays at Columbia wireless networks

2
Number of mDNS packets by service types

• Measured using mDNSNetMonitor during 2 minutes

Service Type Total pkts Probe
Goodbye BrowseQ BrowseA ResolveQ
ResolveA _daap._tcp. 10596
5 2 330 1774
6183 2302 _afpovertcp._tcp.
540 6 2 42
473 0
17 _workstation._tcp. 342 46
7 0 103
0 186 _ipp._tcp.
292 51 2 11
94 2
132 _services._dns-sd. 225 0
0 0 225
0 0 _ssh._tcp.
166 3 1 5
8 70
79 _presence._tcp. 123 0
0 16 15
73 19 _bittorrent._tcp.
119 0 0 79
40 0 0 _dacp._tcp.
115 16 3
0 34 0
62 _cups._sub. 103
0 2 9
92 0 0 _ftp._tcp.
86 3 1
21 53 0
8 _raop._tcp. 64
0 0 41 0
23 0 _rfb._tcp.
37 3 2
1 21 0
10 _appletv-pair._tcp. 35 0
0 35 0
0 0 _appletv._tcp.
35 0 0
35 0 0 0
3
Service types

• Service Types
• iTunes music sharing _daap._tcp.
  
• Apple File Sharing _afpovertcp._tcp.
• Workgroup manager _workstation._tcp.
• Internet printing protocol _ipp._tcp.
• _services._dns-sd.
• SSH _ssh._tcp.
• iChat AV _presence._tcp.
• _bittorrent._tcp.
• iTunes Digital Audio Control Protocol
  _dacp._tcp.
• _cups._sub.
• FTP _ftp._tcp.
• _raop._tcp.
• _rfb._tcp.
• _appletv-pair._tcp.
• _appletv._tcp.

4
Ratio of mDNS packets

• Ratio of mDNS packets

5
Error rate of mDNS packets

• Error rate Pe ( of transmitted packets - of
  received packets) / ( of transmitted packets)

6
Retransmission rate of mDNS packets

• Retransmission rate ( of retransmitted packets
  / of total packets)