ppt - Andrew.cmu.edu
... For user to control display: rewind, fast forward, pause, resume, etc… Out-of-band protocol (uses two connections, one for control messages (Port 554) and one for media stream) RFC 2326 permits use of either TCP or UDP for the control messages connection, sometimes called the RTSP Channel As before, ...
... For user to control display: rewind, fast forward, pause, resume, etc… Out-of-band protocol (uses two connections, one for control messages (Port 554) and one for media stream) RFC 2326 permits use of either TCP or UDP for the control messages connection, sometimes called the RTSP Channel As before, ...
Sockets
... • Address: data structure of address of local system – IP address and port number (demux keys) – Same operation for both connection-oriented and ...
... • Address: data structure of address of local system – IP address and port number (demux keys) – Same operation for both connection-oriented and ...
IP spoofing
... IP Spoofing – Basic Overview Because the source address is not the same as the attacker’s address, any replies generated by the destination will not be sent to the attacker. Attacker must have an alternate way to spy on traffic/predict responses. To maintain a connection, Attacker must adhere ...
... IP Spoofing – Basic Overview Because the source address is not the same as the attacker’s address, any replies generated by the destination will not be sent to the attacker. Attacker must have an alternate way to spy on traffic/predict responses. To maintain a connection, Attacker must adhere ...
Src
... • How many RST packets are needed to span the entire sequence number space? • Using 58 byte RST packets on a 10 Mbps link, how long does it take to generate this number of packets? ...
... • How many RST packets are needed to span the entire sequence number space? • Using 58 byte RST packets on a 10 Mbps link, how long does it take to generate this number of packets? ...
server
... Non-persistent and persistent connections Non-persistent HTTP/1.0 server parses request, responds, and closes TCP connection 2 RTTs to fetch each object Each object transfer suffers from slow start (due to tcp’s congestion-control method) But most 1.0 browsers use parallel TCP connections. ...
... Non-persistent and persistent connections Non-persistent HTTP/1.0 server parses request, responds, and closes TCP connection 2 RTTs to fetch each object Each object transfer suffers from slow start (due to tcp’s congestion-control method) But most 1.0 browsers use parallel TCP connections. ...
Real firewall rule-bases have a large degree of structure
... In search data structure, we first consider the protocol header field. The protocol field is different from the other four fields: very few of the 256 possible values are in use, and it makes to define a numerical “range” of protocol values. This intuition is validated by the data gathered from real ...
... In search data structure, we first consider the protocol header field. The protocol field is different from the other four fields: very few of the 256 possible values are in use, and it makes to define a numerical “range” of protocol values. This intuition is validated by the data gathered from real ...
CCNA2 3.0-08 TCPIP Suite Error and Control Messages
... ICMP Time Stamp The TCP/IP protocol suite allows systems to connect over vast distances. Each individual networks might provide it’s own synchronization. If host are using software that requires time synchronization can cause troubles. ICMP timestamp request can be used. There is a timestamp request ...
... ICMP Time Stamp The TCP/IP protocol suite allows systems to connect over vast distances. Each individual networks might provide it’s own synchronization. If host are using software that requires time synchronization can cause troubles. ICMP timestamp request can be used. There is a timestamp request ...
1 Introduction
... LVS ( Linux Virtual Server) cluster, there are one or two load balancer and a number of real servers. The front end of the real servers is a load balancer, which schedules the requests to different real servers and make parallel service of the cluster to appear as a virtual service on a single IP ad ...
... LVS ( Linux Virtual Server) cluster, there are one or two load balancer and a number of real servers. The front end of the real servers is a load balancer, which schedules the requests to different real servers and make parallel service of the cluster to appear as a virtual service on a single IP ad ...
Chapter 2
... the required response times. Some of the main features of frame relay are as follows: a) Connection Oriented b) Based on packet switching c) No link level error and flow control d) Routing decision, as to which node a packet should be forwarded to moved from layer 3 in IP/X.25 to layer 2 in Frame Re ...
... the required response times. Some of the main features of frame relay are as follows: a) Connection Oriented b) Based on packet switching c) No link level error and flow control d) Routing decision, as to which node a packet should be forwarded to moved from layer 3 in IP/X.25 to layer 2 in Frame Re ...
Module 8 Transport Layer Protocols
... UDP Use and Format • often used for streaming multimedia apps! ➡ loss tolerant! ➡ rate sensitive! ...
... UDP Use and Format • often used for streaming multimedia apps! ➡ loss tolerant! ➡ rate sensitive! ...
SDN and Mininet - CSE Labs User Home Pages
... do not forward (block) all datagrams destined to TCP port 22 Switch MAC Port src ...
... do not forward (block) all datagrams destined to TCP port 22 Switch MAC Port src ...
例外(exception）とは何か
... - 214 = 16384 Class B network addresses already almost exhausted Type of service - Different applications have different requirements for delivery reliability & speed - Current IPv4 has type of service that's not often implemented - Effective multimedia communication - Data encryption and authenti ...
... - 214 = 16384 Class B network addresses already almost exhausted Type of service - Different applications have different requirements for delivery reliability & speed - Current IPv4 has type of service that's not often implemented - Effective multimedia communication - Data encryption and authenti ...
Multimedia Networking
... divides video file into multiple chunks each chunk stored, encoded at different rates manifest file: provides URLs for different chunks ...
... divides video file into multiple chunks each chunk stored, encoded at different rates manifest file: provides URLs for different chunks ...
... A SYN flood is a form of denial-of-service attack in which an attacker sends a succession of SYN requests to a target's system. A malicious client can skip sending this last ACK message. Or by spoofing the source IP address in the SYN, it makes the server send the SYN-ACK to the falsified IP address ...
Investigating Network Performance – A Case Study
... • iperf TCP JBO Mk5 to Man. rtt ~1ms 4420 byte packets get 960 Mpbs shows 94.7% kernel usage and 1.5% idle • iperf TCP JBO Mk5 to JIVE rtt ~15ms 4420 byte packets get 777 Mpbs shows 96.3% kernel usage and 0.06% idle – no cpu left! • Likelihood is that Onsala Mk 5 marginally faster cpu – at critical ...
... • iperf TCP JBO Mk5 to Man. rtt ~1ms 4420 byte packets get 960 Mpbs shows 94.7% kernel usage and 1.5% idle • iperf TCP JBO Mk5 to JIVE rtt ~15ms 4420 byte packets get 777 Mpbs shows 96.3% kernel usage and 0.06% idle – no cpu left! • Likelihood is that Onsala Mk 5 marginally faster cpu – at critical ...
Principles of reliable data transfer
... DNS protocol : query and reply messages, both with same message format msg header ...
... DNS protocol : query and reply messages, both with same message format msg header ...
cap2-2003
... • Socket(String host, int port) The port must be in the range 1-65,535 • Socket(Inet Address host, int port)The same but with an InetAddress object as parameter • Socket(String host, int port, String localHost, int localport) Every TCP communication consists of a local and remote host and a local an ...
... • Socket(String host, int port) The port must be in the range 1-65,535 • Socket(Inet Address host, int port)The same but with an InetAddress object as parameter • Socket(String host, int port, String localHost, int localport) Every TCP communication consists of a local and remote host and a local an ...
The URL
... • Socket(String host, int port) The port must be in the range 1-65,535 • Socket(Inet Address host, int port)The same but with an InetAddress object as parameter • Socket(String host, int port, String localHost, int localport) Every TCP communication consists of a local and remote host and a local an ...
... • Socket(String host, int port) The port must be in the range 1-65,535 • Socket(Inet Address host, int port)The same but with an InetAddress object as parameter • Socket(String host, int port, String localHost, int localport) Every TCP communication consists of a local and remote host and a local an ...
security
... information the server needs to communicate with the client using SSL. The server sends the client the server's SSL version number, cipher settings, randomly generated data, and other information the client needs to communicate with the server over SSL. The server also sends its own certificate and, ...
... information the server needs to communicate with the client using SSL. The server sends the client the server's SSL version number, cipher settings, randomly generated data, and other information the client needs to communicate with the server over SSL. The server also sends its own certificate and, ...
SECURITY FEATURES OF SIP
... SIP 1xx – used to send informational responses such as the request is being processed. SIP 2xx – used to send successful responses. SIP 3xx – used to send redirection responses indicating further actions are required to complete the request. SIP 4xx – used to send failure responses on client ...
... SIP 1xx – used to send informational responses such as the request is being processed. SIP 2xx – used to send successful responses. SIP 3xx – used to send redirection responses indicating further actions are required to complete the request. SIP 4xx – used to send failure responses on client ...
Document
... • buffering when arrival rate via switch exceeds output line speed • queueing (delay) and loss due to output port buffer overflow! ...
... • buffering when arrival rate via switch exceeds output line speed • queueing (delay) and loss due to output port buffer overflow! ...
Multimedia Networking
... RTCA including VoIP and Video Conferencing are compelling and very popular. Standards bodies (IETF and ITU) have been and continue to be busy at hammering out standards for this class of applications With the appropriate standards in place, independent companies are creating new products that intero ...
... RTCA including VoIP and Video Conferencing are compelling and very popular. Standards bodies (IETF and ITU) have been and continue to be busy at hammering out standards for this class of applications With the appropriate standards in place, independent companies are creating new products that intero ...
IPTV
... therefore, it poses a challenge in providing maximum service, efficient delivery of IP based payload including voice, video, multimedia and Internet over wireless. • For real time streaming video services, UDP ports can be used and for video on demand (VoD), TCP ports can be used. • Broadcast, multi ...
... therefore, it poses a challenge in providing maximum service, efficient delivery of IP based payload including voice, video, multimedia and Internet over wireless. • For real time streaming video services, UDP ports can be used and for video on demand (VoD), TCP ports can be used. • Broadcast, multi ...
Network
... the full packet to arrive in switch before sending to the next switch (good for WAN) • Cut-through routing or worm hole routing: switch examines the header, decides where to send the message, and then starts forwarding it immediately – In worm hole routing, when head of message is blocked, message s ...
... the full packet to arrive in switch before sending to the next switch (good for WAN) • Cut-through routing or worm hole routing: switch examines the header, decides where to send the message, and then starts forwarding it immediately – In worm hole routing, when head of message is blocked, message s ...