1. What are the data
units at different layers of the TCP / IP protocol suite
The data unit created at the application layer is called a message, at the transport layer the data unit created is called either a segment or an user datagram, at the network layer the data unit created is called the datagram, at the data link layer the datagram is encapsulated in to a frame and finally transmitted as signals along the transmission media.
The data unit created at the application layer is called a message, at the transport layer the data unit created is called either a segment or an user datagram, at the network layer the data unit created is called the datagram, at the data link layer the datagram is encapsulated in to a frame and finally transmitted as signals along the transmission media.
2. What is Project
802
It is a project started by IEEE to set standards that enable intercommunication between equipment from a variety of manufacturers. It is a way for specifying functions of the physical layer, the data link layer and to some extent the network layer to allow for interconnectivity of major LAN protocols. It consists of the following:
It is a project started by IEEE to set standards that enable intercommunication between equipment from a variety of manufacturers. It is a way for specifying functions of the physical layer, the data link layer and to some extent the network layer to allow for interconnectivity of major LAN protocols. It consists of the following:
802.1 is an internetworking standard for
compatibility of different LANs and MANs across protocols.
802.2 Logical link control (LLC) is the
upper sublayer of the data link layer which is non-architecture-specific, that
is remains the same for all IEEE-defined LANs. Media access control (MAC) is
the lower sublayer of the data link layer that contains some distinct modules
each carrying proprietary information specific to the LAN product being used.
The modules are Ethernet LAN (802.3), Token ring LAN (802.4), Token bus LAN
(802.5).
802.6 is distributed queue dual bus (DQDB)
designed to be used in MANs.
3. What is Bandwidth
Every line has an upper limit and a lower limit on the frequency of signals it can carry. This limited range is called the bandwidth.
Every line has an upper limit and a lower limit on the frequency of signals it can carry. This limited range is called the bandwidth.
4. Difference
between bit rate and baud rate.
Bit rate is the number of bits transmitted during one second whereas baud rate refers to the number of signal units per second that are required to represent those bits.
Bit rate is the number of bits transmitted during one second whereas baud rate refers to the number of signal units per second that are required to represent those bits.
baud rate = bit rate / N where N is no-of-bits
represented by each signal shift.
5. What is MAC
address
The address for a device as it is identified at the Media Access Control (MAC) layer in the network architecture. MAC address is usually stored in ROM on the network adapter card and is unique.
The address for a device as it is identified at the Media Access Control (MAC) layer in the network architecture. MAC address is usually stored in ROM on the network adapter card and is unique.
6. What is
attenuation
The degeneration of a signal over distance on a network cable is called attenuation.
The degeneration of a signal over distance on a network cable is called attenuation.
7. What is cladding
A layer of a glass surrounding the center fiber of glass inside a fiber-optic cable.
A layer of a glass surrounding the center fiber of glass inside a fiber-optic cable.
8. What is RAID
A method for providing fault tolerance by using multiple hard disk drives.
A method for providing fault tolerance by using multiple hard disk drives.
9. What is NETBIOS
and NETBEUI
NETBIOS is a programming interface that allows I/O requests to be sent to and received from a remote computer and it hides the networking hardware from applications. NETBEUI is NetBIOS extended user interface. A transport protocol designed by microsoft and IBM for the use on small subnets.
NETBIOS is a programming interface that allows I/O requests to be sent to and received from a remote computer and it hides the networking hardware from applications. NETBEUI is NetBIOS extended user interface. A transport protocol designed by microsoft and IBM for the use on small subnets.
10. What is
redirector
Redirector is software that intercepts file or prints I/O requests and translates them into network requests. This comes under presentation layer.
Redirector is software that intercepts file or prints I/O requests and translates them into network requests. This comes under presentation layer.
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