SitePlayer Telnet User’s Manual
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“Multicast DNS (mDNS) provides the ability to do DNS-like operations on the local link in the absence
of any conventional unicast DNS server. In addition, mDNS designates a portion of the DNS name-
space to be free for local use, without the need to pay any annual fee, and without the need to set
up delegations or otherwise configure a conventional DNS server to answer for those names. The
primary benefits of mDNS names are that (i) they require little or no administration or configuration
to set them up, (ii) they work when no infrastructure is present, and (iii) they work during infrastruc-
ture failures. “
SitePlayer uses mDNS to advertise its name and the services it has available. SitePlayer uses the standard
mDNS port of 5353. It also receives DNS and mDNS queries using the standard DNS port of 53. This means
that standard DNS clients can query SitePlayer.
Bonjour
The combination of ZeroConf LL and mDNS allows SitePlayer services to be browsable by Bonjour browsers.
Bonjour is an Apple trademark which
“enables automatic discovery of computers, devices, and services on IP networks. Bonjour uses indus-
try standard IP protocols to allow devices to automatically discover each other without the need to
enter IP addresses or configure DNS servers. Bonjour is an open protocol which Apple has submitted
to the IETF as part of the ongoing standards-creation process. ”
Dynamic Host Configuration Protocol (DHCP)
SitePlayer uses DHCP in the presence of a DHCP server to configure its IP address, gateway and network
mask.
Transmission Control Protocol / Internet Protocol (TCP/IP)
TCP/IP is the core communications protocol that SitePlayer uses to communicate reliably on the network.
User Datagram Protocol (UDP)
UDP is used by such things as mDNS and the SitePlayer UDP serial protocol. UDP is not a reliable protocol
and thus data sent with UDP is not guaranteed to arrive at its destination. If you use UDP to communicate
with SitePlayer, you will need to take this into account.
Hypertext Transfer Protocol (HTTP)
HTTP is the web protocol which is used to communicate with SitePlayer’s web server. SitePlayer’s web server
is primarily used to display and set SitePlayer’s configuration.
Telnet
This service is used to pass data between a network connection and SitePlayer’s serial port. The default TCP/
IP port for Telnet is 23. The easiest way to attach to SitePlayer’s serial port is to issue a telnet command. For
example,
telnet 192.168.2.7
Characters typed into the Telnet program are sent to SitePlayer. Characters that SitePlayer receives are sent
to the Telnet program.
Summary of Contents for SitePlayer Telnet Series
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