network-protocols

问题 As written in the heading, my question is, why does TCP/IP use big endian encoding when transmitting data and not the alternative little-endian scheme? 回答1: RFC1700 stated it must be so . (and defined network byte order as big-endian). The convention in the documentation of Internet Protocols is to express numbers in decimal and to picture data in "big-endian" order [COHEN]. That is, fields are described left to right, with the most significant octet on the left and the least significant

问题 What is the highest port number one can use? 回答1: The port number is an unsigned 16-bit integer, so 65535. 回答2: The largest port number is an unsigned short 2^16-1: 65535 A registered port is one assigned by the Internet Corporation for Assigned Names and Numbers (ICANN) to a certain use. Each registered port is in the range 1024–49151. Since 21 March 2001 the registry agency is ICANN; before that time it was IANA. Ports with numbers lower than those of the registered ports are called well

问题 I would like to make BIT (Built in tests) to a number of server in my cloud. I need the request to fail on large timeout. How should I do this with java? Trying something like the below does not seem to work. public class TestNodeAliveness { public static NodeStatus nodeBIT(String elasticIP) throws ClientProtocolException, IOException { HttpClient client = new DefaultHttpClient(); client.getParams().setIntParameter(\"http.connection.timeout\", 1); HttpUriRequest request = new HttpGet(\"http:/

问题 I am building a small chat application for friends, but unsure about how to get information in a timely manner that is not as manual or as rudimentary as forcing a page refresh. Currently, I am implementing this using simple AJAX, but this has the disadvantage of regularly hitting the server when a short timer elapses. In researching long/short polling, I ran across HTML5 WebSockets. This seems easy to implement, but I\'m not sure if there are some hidden disadvantages. For example, I think