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Question:
(a) Short Message Service (SMS) is a service available on most mobile phones that allows the sending of short messages between mobile phones, other handheld devices and even landline telephones.
Briefly describe why an SMS is limited to 160 characters.
(b) Multimedia Messaging Service (MMS) is a standard for a telephony messaging systems that allow sending messages that includes multimedia objects (images, video, audio, rich text) and not just text messages as in Short message service.
Briefly explain the two modes of delivery in MMS.
(c) Prepare the basic steps that should be taken to secure a WiFi network.
Suppose that frames are 1250 bytes long including 25 bytes of overhead. Also assume that ACK frames are 25 bytes long. Calculate the efficiency of stop-and-wait ARQ (a) Transmits a
Half-Duplex - Capability for data transmission in only single direction at a time among sending station and a receiving station.
What is basic purpose of Routers
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PRAM is one of the models used for designing the parallel algorithm as given in Figure. The PRAM models have the following components: A set of identical type of processors
While calculating shortest path, first we assume graph presentation of network at every node then we use Djikstra's algorithm to calculate shortest path from every node to other on
Packet loss and retransmission in TCP TCP gets reliability by retransmission. An acknowledgement is used to check that data has arrived successfully. If acknowledgement does no
Q. Explain about Traditional Modems? - Subsequent to modulation by the modem an analog signal reaches the telephone company switching station where it sampled and digitized to
What is Microwave? Microwaves have been used in data communications. Microwave has a higher frequency than radio waves and thus can handle larger amounts of data.
Frequency Division Multiplexing Frequency division multiplexing (FDM) is an analogy technique that can be applied when the bandwidth of a link is greater than the combined b
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