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unfortunately building real-life distributed systems is not easy it is hard for instance to implement instructions such as send this data structure
distributed systems are composed of a number of physically separate machines connected by one or more communication links unlike parallel systems
there are two dominant forms of building distributed systems client-server systems ie systems in which one machine acts as a server and act as
when programming a server or a client we have to deal with port numbers and ip addresses but we usually do this through an abstraction called a
a typical layer 2 switch has a number of features identify and explain 5 features that you think are important that you would consider in your
megacorp inc is a large manufacturing firm that operates 5 factories in dallas 4 factories in los angeles and 5 factories in albany new york
identify and briefly explain any four key requirements that need to be examined when considering deploying a wlan
assume the following 64-bit des key expressed in hexadecimal fefe fefe fefe fefea what is the term for such a keyb state the value of each of the
alice sends a message to bob encrypted with a symmetric key bob decrypts the message and finds it is a purchase order for an expensive workstation
recalling two fec schemes for internet phone described suppose the first scheme generates a redundant chunk for every four original chunks suppose
consider an rtp session consisting of five users all of which are sending and receiving rtp packets into the same multicast address each user sends
consider the procedure described for estimating average delay di suppose that u01 let r1-t1 be the most recent sample delay let r2
in the voip system let h be the total number of header bytes added to each chunk including udp and ip headera assuming an ip datagram is emitted
drawback of repeatersrepeater has no filtering capability as it forwards every framerepeater shell be placed at accurate
advantage of repeatersrepeaters provide the advantage of increasing type size of lan or connecting lan segments repeater can overcome
repeaterrepeater is also named as active hub operates at physical layer of osi model repeater is an electronic device that simply
huba hub is a small box that connects individual devices on network so that these devices can communicate with
network devices ahubbrepeatercbridgedgatewayeswitchfrouterconnecting devices can classified into networking and internetworking devices
data transferafter connection is established bidirectional data transfer can take place the client and server can
network layer and routing as discussed in previous chapters the physical layer provides connection sand services to the data
tcp connection management tcp connection management encompasses the procedures for establishing and terminating connection ftcp is connection
round trip time rtt and time outthe size and the complexity of computer networks have grown in past years to achieve an
options negotiationto use any of the options first requires option negotiation between the client and server four control
telnet protocolsthe tcp ip protocol suite includes a simple textual remote terminal protocols called telnet that allow a user
byte numbertcp number all data bytes that are transmitted in a connection numbering is independent in each direction when tcp