Interview Questions And Answers

Provide signal flow management.
Replace slower hub.
Being a Data Link Layer device uses MAC address for data transfer.
Data transfer to specific port.

Simplest and low cost device.
Also known as Multi-port Repeater.
Operate at Physical Layer like Repeater.
Data transfer to all the ports.

Hub types:
1. Active hub - Provides signal regeneration
2. Passive hub - No signal regeneration
3. Intelligent hub - Provides management of each port

IP address structure consists of two addresses, Network and Host.

IP address is divided into five classes.

A Unique, 32-bit address used by computers to communicate over a computer network.

Normal Response Mode (NRM) - Secondary station requires permission from primary station before sending data.

Asynchronous Response Mode (ARM) - Secondary station can transfer without permission from primary station.

Asynchronous Balanced Mode (ABM) - Either of the combined station can initiate the transmission.

Types of HDLC nodes are:
1. Primary Station
2. Secondary Station
3. Combined Station

Supported link configurations:
1. Unbalanced
2. Balanced

High Level Data Link Control (HDLC) and Synchronous Data Link Control (SDLC) are bit-oriented synchronous protocols in which data frames are interpreted as series of bits.

Both are useful for half-duplex and full-duplex communication.

Windows XP still support DLC.

IPX/SPX/NetBIOS Compatible Transport Protocol (NWLink) uses two types of IPX network numbers for routing purposes:
1. Internal network number - Mentioned as Internal network number in NWLink IPX/SPX/NetBIOS Compatible Transport Protocol Properties dialog box.

2. External network number - Mentioned as Network number in Manual Frame Detection dialog box.

Novell NetWare system uses IPX/SPX as communication protocol within networks.

IPX operates at Network layer for connectionless communication.

SPX operates at Transport layer for connection-oriented communication.

Together, IPX/SPX provides same services as TCP/IP.

User Datagram Protocol (UDP) provides connectionless process-to-process communication.

UDP packets are called user datagrams.