Q1. How many stations can be connected to 10Base2, 10BaseT, and 10Base5?
- 10Base2: 30
- 10BaseT: 1024 stations per network
- 10Base5: 100 nodes per segment and maximum network length of 10Base5 is five segments i.e. approximately 2500 meter
Q2. What is the maximum network length of 10Base2 and 10Base5?
- The maximum network length of 10Base2 is 185 m for each segment and can be extended up to five segments
- The maximum network length of 10Base5 is 500 m for each segment and can be extended up to five segments
Q3. What is Fiber Distributed Data Interface (FDDI)?
- FDDI is token-passing dual ring fiber optic LAN specification. It supports higher transmission speeds across larger distances of around 2 km (1.3 miles) between two stations.
Q4. What is network binding?
- A network binding binds a protocol to an adapter to carry traffic using that protocol.
Q5. What is NetBIOS Extended User Interface(NetBEUI) and is it routable?
- NetBEUI is designed for peer-to-peer network and is a high speed protocol used on small networks. It provides a good recovery and error protection.
- No, its not routable
Q6. Where is IPX/SPX used?
- IPX/SPX stands for inter-network packet Exchange/Sequenced packet Exchange. It is used in the Netware environment. IPX tuns at the network layer of the Open System Interconnection (OSI) model; whereas, SPX runs at the transport layer of the OSI model.
Q7. What is NetBIOS?
- NetBIOS stands for Network Basic Input/Output System. It ia an application interface, which operates at the session layer. It enables communication between application with NetBIOS compliant protocol. NetBIOS applications can be supported over Transmission Control Protocol/Internet Protocol (TCp/IP) and IPX/SPX
Q8. What is the role of Internet Protocol (IP)?
- IP provides connectionless delivery between computer systems. It does not guarantee the delivery of the packets.
Q9. What is the role of Transmission Control Protocol (TCP) ?
- TCP provides acknowledged and connection oriented communication. It provides guaranteed delivery with proper sequencing of packets and data integrity checks.
Q10. What is the role of User Datagram Protocol (UDP)?
- UDP is designed for connectionless unacknowledged communications. It adds the information about the source and destination socket identifiers in the datagrams; however, it provides and unreliable service and datagrams may arrive out of order, or appear duplicated.
Q11. What is the role of Address Resolution Protocol (ARP)?
- ARP restored IP Addresses to Media Access Control (MAC) addresses. Physical frames have to be addressed to hardware MAC address of destination network deice
Q1. What types of topologies are commonly used for Local Area Network (LAN) and Wide Area Network (WAN)?
- Bus, ring, star, mesh, tree and cellular topologies are used for LANs; whereas , point-to-point, multipoint, mesh and cloud topologies are used for WANs.
Q2. Explain tree topology.
- A tree topology is a LAN architecture that is similar to the bus topology but with multiple nodes. It can also be defined as a combination of the bus and star topologies.
Q3. What devices are currently used in LAN networks?
- The commonly used devices in the LAN network are repeaters, hubs, LAN extenders, bridges, LAN switches and routers.
Q4. What is repeater?
- A repeater is a device used to interconnect the media segments of an extended network. It enables a series of cable segments to be treated as a single cable. Repeaters receive signals from one network segment and amplify, retime, and retransmit those signals to another network segment to prevent signal deterioration caused by long cable lengths and large numbers of connected devices.
Q5. What is hub?
- A hub is a device that connects multiple user stations , each through a dedicated cable.
Q6. Multiple devices cannot communicate on the network simultaneously; therefore, what type of method must be used to allow one device to access network media at a time?
- Carrier Sense Multiple Access/ Collision Detection (CSMA/CD) and token passing
Q7. What is CSMA/CD?
- CSMA/CD is a layer 2 access method in which if a transmission data station detects another signal while transmitting a frame, it stops transmitting the frame. Instead of the frame, it transmits a jam signal, and then waits for a random time interval before trying to send the frame again.
Q8. What is token passing?
- A token is small frame, which is passed from one node to another in a token ring network. If a node has data to send, it must wait until it receives a token. After the token is received by the node, it seizes the token, makes it as used, and attaches the data. The frame is then addressed to the destination node and the node continues passing the data around the ring until it arrives at the destination node. The destination node copies the data and marks the frame as received. When the sender node receives the frame, it implies that the data is successfully delivered. The sender node then frees the token to be used by another node.
Q9. List the reasons of transmission failure?
- Bad cabling
- Improper termination
- Collisions
- Improper cable length
Q1. What are the main types of computer cabling?
- Twisted pair cable
- Coaxial cable
- Fiber-optic cable
Q2. What is Twisted pair?
- Twisted pair is made up of insulated copper wire twisted around each other to form wire pairs. It helps in reducing the noise from external sources and crosstalk on multi-pair cables.
Q3. How many classes of twisted pair are available?
- Unshielded Twisted pair (UTP)
- Shielded Twisted pair (STP)
Q4. Category 3 and Category 5 cables belong to which class of Twisted pair?
- Unshielded Twisted pair (UTP)
Q5. How many Twisted pairs of copper wire are there in Category 5 cable?
- The Category 5 cable contains four Twisted pairs of copper wire that are capable of transmission of up to 100 Mbps
Q6. How is STP cable different from Coaxial cable?
- In STP cable, the Twiosted pair is wrapped in foill to decrease external interference and electromagnetic radiations.
- In Coaxial cable, the center cable is insulated by a plastic-foam, a second conductor, a foil wrap, and an external plastic tube.
Q7. List the commonly used coaxial cable?
- 10Base5(Ethernet)- RG8 and RG11
- 10Base2(Ethernet)- RG58
- Cable TV- RG59
- ARCnet- RG62
Q8. What is fiber-optic cable?
- Fiber optic cable is used to transmit light signals over long distances. Ot has the ability to carry large amount of bandwidth over a greater distance at faster speeds. Fiber-optic cable has the core in the center, which is the glass fiber that carries the light signals. The cladding layer surrounds the core and acts as a mirror allowing the light to reflect off it as the light travels. Outermost layer of the cable is buffer coating, which protects both fiber and cladding and prevents signals from leaking out of the cable. It also protects the fiber from damage and moisture.
Q9. Explain the function of fiber-optic cable?
- The fiber-optic cable uses light pulses to carry and transmit data from point to point. Pulses of light are sent from one end pf the cable to the other end. The pulses represent data being transmitted that a decoder at the other end of the cable can decode into information.
Q10. What are the two different types of Fiber-optic cables?
- Single-mode cable: It has one glass Fiber strand.
- Multi-mode cable: It has two or more strands along the line. These are physically larger when compared to single-mode fibers.
Q11. How long is 10Base5 Ethernet cable?
Q12. What is High Definition Multimedia Interface (HDMI)?
- HDMI is an interface standard used for audio-visual equipment, such as high-definition television and DVD player. It simplifies cabling and provides users with high-quality home theater experience by delivering crystal-clear all-digital audio and video through a single cable.
Q13. What is the bandwidth of HDMI cable?
- up to 5 Gigabytes per second.
Q14. What is Ethernet cord connector?
- Ethernet cord connector is a device to connect two Ethernet cables. It is a small box that connects two shorter Ethernet cables.
Q15. What is crossover cable?
- Crossover cable is used to connect same type of devices. It can be used to:
-Connect two computers directly.
-Connect a router's LAN port to a switch/hub's normal port, which is used for
expanding network
-Connect two switches.hubs by using normal port in both switches/hubs
Q16. What is a Straight cable?
- Straight cable is used to connect different type of devices. It can be used to:
-Connect a computer to Switch/hub
-Connect a computer to a cable/DSL modem's LAN port
-Connect a router's WAN port to a cable/DSL modem's LAN port
-Connect a Rot\uter's LAN port to a switch/hub's uplink port
Q1. What is a network card?
- A network card is an expansion card installed in a computer that enables the computer to be physically connected to a network.
Q2. List the different type of network card.
- Ethernet card
- Wireless network card
- Token ring network card
Q3. What are the different type of connectors?
- The different types of connectors are the RJ-45, DB-25, RJ-11, DB-9, Bayonet Neill-Concelman (BNC), PS2/MINI-DIN, and Universal Serial Bus (USB)
Q4. What is the use of RJ-11 connector?
- The RJ-11 connector is generally used to connect standard telephone cord.
Q5. What connectors are used in the Ethernet and wireless network cards?
- Ethernet network cards use the RJ-45 connector and wireless network card usually have an antenna jack instead of an external connection.
Q6. What is the use of RJ-45 connector?
- The RJ-45 connector is an industry standard for Ethernet and fast Ethernet networking. It is used to attach short cable to connect the computer to wall jack.
Q7. What is the USB connector?
- USN is an external hardware interface and communications standard that is utilized for connecting varied peripherals to a computer, such as Keyboard, mouse, Pen drive, Memory sticks, digital cameras etc.
Q8. What type of connector is used to connect a modem to wall jack?
Q9. How many devices can be connected to one USB port?
- USB hubs can generally extend a USB network to a maximum of 127 ports.
