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11-30-2011, 04:34 PM
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cs610 midterm papers 2010
Paper#1
what is 10base T? What is Multicasting? What is FDDI? Define 802.11 Wireless lans and CSMA? Paper#2 Define Static & Dynamic Routing 2 Marks Dijkart's Algorithm 2 Marks write note on Bridges 5 Marks Disadvantages of Repeaters 3 Marks Different b/w Cells and Packets 5 Marks Diffe b/w LAN and WAN 2 marks Why fiber need fir ATM 3 marks define bridge 3 marks ambiguity may cause the failure of any network,how parity bit check is consider in this situation 5 marks define default route how it is deff from routing 5 marks WHAT IS THROUGHPUT BRIDGES. HOW BRIDGE MAINTAINS ADDRESS LIST REPEATERS, DRAWBACK OF REPEATORS ATM USES CELL INSTEAD PACKET , WHY A,B,C,D CONNECTED WITH X AND E,F,G,H CONNECTED WITH Y ,COMPUTER A WANTS TO SEND SOMETHING TO COMPUTER H, HOW IT WILL SEND Question: What is 10base T? Solution: An Ethernet standard for cable. The 10 refers to its 10 Mbps bandwidth, the base to single channel baseband, and the T to Twisted pair. The cable uses two pairs of unshielded twisted wires 10BASE-T: This is another standard of wiring scheme. It is commonly called 10Base-T, Twisted Pair or TP Ethernet. It replaces AUI cable with twisted pair cable and thick coax with hub. This makes it cheaper and that ‘s why it is most useful technology of today. It is shown in the figure below: Ethernet over twisted pair refers to the use of cables that contain insulated copper wires twisted together in pairs for the physical layer of an Ethernet network—that is, a network in which the Ethernet protocol provides the data link layer. Question: What is Multicasting? Solution: Multicast is communication between a single sender and multiple receivers on a network. It works like broadcasting however it does not forward frames automatically to the CPU. The interface hardware is programmed in advance to accept certain frames that have multicast address as the destination address. If an application program wishes to receive certain frames then it program the interface hardware to accept an additional set of addresses. Question: What is FDDI? Solution: FDDI: Fiber distributed data interconnect (FDDI) is another ring technology. Its most important features are: It uses fiber optics between stations and transmits data at 100Mbps. It uses pair of fibers to form two concentric rings. The Fiber Distributed Data Interface (FDDI) specifies a 100-Mbps token-passing, dual-ring LAN using fiber-optic cable. FDDI is frequently used as high-speed backbone technology because of its support for high bandwidth and greater distances than copper. FDDI uses a dual-ring architecture with traffic on each ring flowing in opposite directions (calledcounter-rotating). The dual-rings consist of a primary and a secondary ring. During normal operation, the primary ring is used for data transmission, and the secondary ring remains idle. Question: Define 802.11 Wireless lans and CSMA? Solution: 802.11 and 802.11x refers to a family of specifications developed by the IEEEfor wireless LAN (WLAN) technology. 802.11 specifies an over-the-air interface between a wireless client and a base station or between two wireless clients. 802.11 WIRELESS LANs AND CSMA/CA: IEEE 802.11 is standard wireless LAN that uses radio signals at 2.4GHz. Its data rate is 11Mbps. The older devices use radio signals at 900MHz and data rate of 2Mbps. Bluetooth specifies a wireless LAN for short distances. It uses shared medium and radio waves instead of coaxial cable. CSMA/CA: Wireless uses collision avoid ness rather than collision detection. Transmitting computer sends very short message to receiver. Receiver responds with short message reserving slot for transmitter. The response from receiver is broadcast, so all potential transmitters receive reservation. Question: Define Static & Dynamic Routing 2 Marks Question: Dijkart's Algorithm 2 Marks Solution: COMPUTING SHORTEST PATH IN A GRAPH: While computing shortest path, first we assume graph representation of network at each node then we use Djikstra’s algorithm to compute shortest path from each node to every other node. Then extract next hop information from resulting path information and insert next hop information into routing tables. WEIGHTED GRAPH: Djikstra’s algorithm can accommodate weights on edges in graph. The shortest path is then the path with lowest total weight (sum of the weight with all edges). It should be noted that the shortest path is not necessarily with fewest edges (or hops). Question: Write note on Bridges 5 Marks Question: Disadvantages of Repeaters 3 Marks Solution: DISADVANTAGES OF REPEATERS: Repeaters do not recognize frame formats, they just amplify and retransmit the electrical signal. If a collision or error occurs in one segment, repeaters amplify and retransmit also the error onto the other segments. Different b/w Cells and Packets 5 Marks Solution: ATM CELLS: To meet its goals, ATM uses small, fixed sized packets called cells. Each cell has 53 octets. VPI/VCI fields identify the cells destination. CONCEPT OF ‘PACKET’: Network systems divide data in small blocks or junks called packets, which they send individually. My CS610Paper on dated 15-05-2011 Question: Defines simplex and full duplex connection? Marks 2 Question: How WAN capable to handle many computers? Marks 2 Question: Briefly explains the working structure of thick Ethernet. Marks 2 Question: Imagines a network for six devices: A, B, C, D, E and F. all devices are on a same packet switch. Computer A want to send packet to computer E. how would packet switch forward this packet? Marks 3 Question: Does ATM eliminate the varying delay times associated with different sized packets? If yes then give reason. Marks 2 Question: Why ATM design chose cells over packet? Marks 5 Question: Reception is a process of CPU; describe it in a few lines? Marks 5 Dear friends here is my current Midterm paper of CS610 held on 19 May 2011. Objectives are given in the attached file whereas subjective questions are as under:- What are the tasks of NIC? ( Marks: 2 ) Who performs the role to copy data from memory to NIC. Briefly describe the procedure? ( Marks: 2 ) Which quality of service type is used for is used for compressed audio and video. ( Marks: 2 ) A local telephone company wants to connect all of its offices in the city through LAN, which network category is suitable and why? ( Marks: 3 ) What is the relation between Delay and Throughput? ( Marks: 3 ) Differentiate between Public and Private Networks. ( Marks: 5 ) To build up a low-cost network solution which Ethernet is suitable and which cable is best, give reasons as well? ( Marks: 5 ) Paper#1 what is 10base T? What is Multicasting? What is FDDI? Define 802.11 Wireless lans and CSMA? Paper#2 Define Static & Dynamic Routing 2 Marks Dijkart's Algorithm 2 Marks write note on Bridges 5 Marks Disadvantages of Repeaters 3 Marks Different b/w Cells and Packets 5 Mar 20 Numbers of MCQs Define Static & Dynamic Routing 2 Marks Dijkart's Algorithm 2 Marks write note on Bridges 5 Marks Disadvantages of Repeaters 3 Marks Different b/w Cells and Packets 5 Marks Define Static & Dynamic Routing 2 Marks Dijkart's Algorithm 2 Marks write note on Bridges 5 Marks Disadvantages of Repeaters 3 Marks Different b/w Cells and Packets 5 Marks Mostly Mcq's from past papers 
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Linear Mode
