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DateTime Server import java.net.*; import java.io.*; import java.util.Date; public class DayTimeServer { public final static int daytimePort = 5000; public static void main(String[] args) { ServerSocket theServer; Socket theConnection; PrintStream p; try { theServer = new ServerSocket(daytimePort)
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2.5 G systems: voice and data channels for those who can’t wait for 3G service: 2G extensions general packet radio service (GPRS) evolved from GSM data sent on multiple channels (if available) enhanced data rates for global evolution (EDGE) also evolved from GSM, using enhanced modulation data rates up to 384K CDMA-2000 (pha...
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1. Every port is assigned a VLAN color. 2. Every MAC address is assigned a VLAN color. 3. Every layer 3 protocol or IP address is assigned a VLAN color.
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Association Disassociation Reassociation Distribution Integration Distribution Services
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feedback-based flow control, the receiver sends back information (feedback) to the sender to control the flow. rate-based flow control, the protocol has a built-in mechanism that limits the rate at which senders may transmit data.
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Communication satellites and some of their properties, including altitude above the earth, round-trip delay time and number of satellites needed for global coverage.
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Main sectors • Radiocommunications • Telecommunications Standardization • Development Classes of Members • National governments • Sector members • Associate members • Regulatory agencies
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We have discussed some of the popular applications in the Internet Electronic mail, World Wide Web We have discussed multimedia applications We have discussed infrastructure services Domain Name Services (DNS) We have discussed overlay networks Routing overlay, End-system multicast, Peer-to-peer networks We have discussed content distributio...
97 trang | Chia sẻ: nguyenlam99 | Ngày: 10/01/2019 | Lượt xem: 927 | Lượt tải: 0
We have discussed privacy and security issues in the network We have discussed different authentication protocols We have discussed different key distribution protocols We have discussed different cipher techniques Classical and Public-Key We have discussed some examples of secured systems PGP, SSH, IPSec
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Video Compression (MPEG) Frame Types MPEG takes a sequence of video frames as input and compresses them into three types of frames, called I frames (intrapicture), P frames (predicted picture), and B frames (bidirectional predicted picture). Each frame of input is compressed into one of these three frame types. I frames can be thought of as ref...
57 trang | Chia sẻ: nguyenlam99 | Ngày: 10/01/2019 | Lượt xem: 900 | Lượt tải: 0