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3.0 Web Management
CommFront User Manual 15
3.4.2 Operating Mode
CommFront’s device servers offer three types of network connections: TCP socket,
UDP socket, and HTTP web socket.
TCP is a connection-oriented protocol that provides reliable, ordered and error-
checked delivery for network packets. For such reasons, TCP is recommended for
device servers because mission-critical messages are transmitted over a crowded
Ethernet network. Under TCP operating mode, device servers must first establish a
client-server network connection prior to transmitting serial data over a TCP/IP
network. Up to 8 clients can co-exist and communicate with the server concurrently;
however, only one server can exist in a client-server network connection.
UDP is a datagram-oriented (connectionless) protocol that is used for broadcast and
multicast network transmission. UDP works similar to TCP, and it also checks for data
integrity at the arrival time. However, UDP protocol has no fixed order, and it discards
erroneous packets.
HTTPD (or HTTP) is an application-layer protocol for transmitting web contents or
data between web server and the clients. HTTPD follows a classical client-server
model, which means requests are initiated by the client, usually a web browser.
There are a total of five operating modes in CommFront’s device servers.