Daily JOBS
(Interview) Networking Interview Question And Solutions: (Page -3)
Interview : Networking Interview Question And Solutions
(Page -3)
41.
Explain logical link control
One of two sublayers of the data link layer of OSI reference model, as
defined by the IEEE 802 standard. This sublayer is responsible for maintaining
the link between computers when they are sending data across the physical
network connection.
42. Why should you care about the OSI Reference Model
It provides a framework for discussing network operations and design.
43. Explain the difference between routable and non- routable protocols
Routable protocols can work with a router and can be used to build large
networks. Non-Routable protocols are designed to work on small, local networks
and cannot be used with a router
44. Explain MAU
In token Ring , hub is called Multistation Access Unit(MAU).
45. Explain 5-4-3 rule
In a Ethernet network, between any two points on the network, there can be
no more than five network segments or four repeaters, and of those five segments
only three of segments can be populated.
46. Explain the difference between TFTP and FTP application layer protocols
The Trivial File Transfer Protocol (TFTP) allows a local host to obtain
files from a remote host but does not provide reliability or security. It uses
the fundamental packet delivery services offered by UDP.
The File Transfer Protocol (FTP) is the standard mechanism provided by TCP / IP
for copying a file from one host to another. It uses the services offered by TCP
and so is reliable and secure. It establishes two connections (virtual circuits)
between the hosts, one for data transfer and another for control information.
47. Explain the range of addresses in the classes of internet addresses
Class A 0.0.0.0 - 127.255.255.255
Class B 128.0.0.0 - 191.255.255.255
Class C 192.0.0.0 - 223.255.255.255
Class D 224.0.0.0 - 239.255.255.255
Class E 240.0.0.0 - 247.255.255.255
48. Explain the minimum and maximum length of the header in the TCP segment
and IP datagram
The header should have a minimum length of 20 bytes and can have a maximum
length of 60 bytes.
49. Explain difference between ARP and RARP
The address resolution protocol (ARP) is used to associate the 32 bit IP
address with the 48 bit physical address, used by a host or a router to find the
physical address of another host on its network by sending a ARP query packet
that includes the IP address of the receiver. The reverse address resolution
protocol (RARP) allows a host to discover its Internet address when it knows
only its physical address.
50. Explain ICMP
ICMP is Internet Control Message Protocol, a network layer protocol of the
TCP/IP suite used by hosts and gateways to send notification of datagram
problems back to the sender. It uses the echo test / reply to test whether a
destination is reachable and responding. It also handles both control and error
messages.
51. 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.
52. Explain 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:
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.
53. Explain 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.
54. 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. baud rate = bit rate / N where N is no-of-bits represented
by each signal shift.
55. Explain 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.
56. Explain attenuation
The degeneration of a signal over distance on a network cable is called
attenuation.
57. Explain cladding
A layer of a glass surrounding the center fiber of glass inside a
fiber-optic cable.
58. Explain RAID
A method for providing fault tolerance by using multiple hard disk drives.
59. Explain 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.
60. Explain redirector
Redirector is software that intercepts file or prints I/O requests and
translates them into network requests. This comes under presentation layer.
