Your network contains a server named Server1 that has the Streaming Media Services server role
installed. Server1 is located in the perimeter network. A firewall named Firewall1 connects the
perimeter network and the Internet. You need to ensure that clients from the Internet can access
streaming content from Server1 by using RTSP. The solution must minimize the number of open
ports on Firewall1. Which two inbound firewall ports should you open on Firewall1? (Each correct
answer presents part of the solution. Choose two.)
A.
TCP 6881
B.
UDP 8080
C.
TCP 1755
D.
TCP 554
E.
UDP 5005
Explanation:
The scheme rtsp requires that commands are issued via a reliable protocol (within the Internet, TCP),
while the scheme rtspu identifies an unreliable protocol (within the Internet, UDP). If the port is
empty or not given, port 554 is assumed. The semantics are that the identified resource can be
controlled by RTSP at the server listening for TCP (scheme “rtsp”) connections or UDP (scheme
“rtspu”) packets on that port of host, and the Request-URI for the resource is rtsp_URL. For example,
the RTSP URL: rtsp://media.example.com:554/twister/audiotrack Systems implementing RTSP MUST
support carrying RTSP over TCP and MAY support UDP. The default port
for the RTSP server is 554 for both UDP and TCP. http://www.ietf.org/rfc/rfc2326.txt
Firewalls for unicast streaming To configure a firewall for unicast streaming, you must open the
ports on the firewall that are required for the connection protocols that are enabled on your server.
If you are streaming content by using either the MMS protocol or the RTSP protocol, you must
support both User Datagram Protocol (UDP) and Transmission Control Protocol (TCP). Open the
ports To enable Windows Media Player and other clients to use the HTTP protocol, the RTSP
protocol, or the MMS protocol to connect to a Windows Media server that is behind a firewall, open
the following ports.
http://support.microsoft.com/kb/827562/en-us
