CS610 Midterm Solved Subjective Questions

C610 Solved Mid Term Subjective Question · These Questions Repeated plenty of time in · Exams so after learning Handout Plz cast a · glance on these questions too

Q1. What is the difference between LAN and WAN?

Answer

Local area network (LAN) LAN is small in size covers the area within a room, building or cities. Wide area network (WAN) WAN is large in size and covers the area cities, countries and continents.

Q2. Define the term Jitter.

Answer

The term Jitter is used for variance in transmission delays. Jitter is significance for voice, video and data. Jitter can occur when a packet is delayed because the network is busy.

Q3. Give a comparison of the following?

Thick Ethernet wiring scheme and Thin Ethernet wiring scheme.

Answer

This uses thick coax cable. AUI cable or transceiver or drop cable connects from NIC to transceiver. AUI cable carries digital signal from NIC to transceiver. The transceiver generates analog signal on coax cable. The wires in AUI carry digital signals power and other control signals. Thick Ethernet also requires terminators to avoid signal reflectance.

Thin Ethernet uses thin coax cable that is cheaper and easier to install than thick Ethernet coax. In thin Ethernet wiring scheme transceiver electronics are built into NIC and NIC connect directly to network medium. Coax cable use connector on NIC. Coax runs directly to back of each connected computer by T-connector. The T-connector directly attaches to NIC.

Q4. How can Switched Virtual Network be established?

Answer

Most networks offer dynamic connections that last for a relatively short time. ATM can dynamically establish a switched virtual circuit SVC that allows it as long as necessary and then terminate it. The computer sends a connection request to the switch to which it is attached. Software in the switch finds a path to the destination and sends with the connection request. Each pair of switches in the path communicates to choose a VPI/VCI for their tables. Once the connection is established a message is given back to the

Q5. Describe permanent virtual circuits (PVC).

Answer

ATM can provide the virtual circuits that look like traditional leased digital circuits. The permanent virtual circuits PVC works as long as the customer pays the periodic fee for its use. The forwarding table enter configured the terms used by Telco Provisioning requires two steps.

•  To determine a complete path.
•  To choose appropriate VPI/VCI for each step in the path and configures each adjacent pair of switches.

Q6. What are default routes draw the table.

Answer

Routing table entries can collapse with a default route. If destination doesn’t have in explicit routing table entry and then it use a default route. It is shown in the below table.

Table

Destination Next hop Destination Next hop Destination Next hop Destination Next hop 3,1 4,2 1,3 2,4 3,2 2,3 4,3 3,4 Node 1 Node 2 Node 3 Node 4

Q7. What is the difference between the physical and logical topologies?

Answer

Every LAN has a topology, or the way that the devices on a network are arranged and how they communicate with each other.

PHYSICL TOPOLOGY:

The way that the workstations are connected to the network through the actual cables that transmit data -- the physical structure of the network -- is called the physical topology. It depends on the wiring scheme.

LOGICAL TOPOLOGY:

The logical topology, in contrast, is the way that the signals act on the network media, or the way that the data passes through the network from one device to the next without regard to the physical interconnection of the devices. We can say that it is defined by the specific network technology.

Q8. Define Vector-Distance Algorithm.

Answer

Packet switches wait for next update message and they iterate through entries in message. If entry has shortest path to destination, insert source as next hop to destination and record distance as distance from next hop to destination plus distance from this switch to next hop.

Q9. What is the concept of store and forward technology?

Answer

STORE AND FORWARD:

Data delivery from one computer to another is accomplished through store and forward technology. In this technology packet switch stores incoming packet and also forwards that packet to another switch or computer. For this purpose packet switch has internal memory into which it can hold packet if outgoing connection is busy. Packets for each connection held on queue.

Q10. How can Switched Virtual Network be established?

Answer

SWITCHED VIRTUAL CIRCUITS:

Most networks offer dynamic connections, which last for a relatively short time. To handle this, ATM can dynamically establish a switched virtual circuit (SVC), allow it last as long as necessary and then terminate it. The terminology comes from the Telco’s where switching system normally refers to all switching.