ImPorTanT NetWorkIng QuEstiOnS Part2.
21. What is Proxy ARP
It is using a router to answer ARP
requests. This will be done when the originating host believes that a
destination is local, when in fact is lies beyond router.
22. What is OSPF
It is an Internet routing protocol that
scales well, can route traffic along multiple paths, and uses knowledge of an
Internet's topology to make accurate routing decisions.
23. What is Kerberos
It is an authentication service developed
at the Massachusetts Institute of Technology. Kerberos uses encryption to
prevent intruders from discovering passwords and gaining unauthorized access to
files.
24. What is a Multi-homed Host
It is a host that has a multiple network
interfaces and that requires multiple IP addresses is called as a Multi-homed
Host.
25. What is NVT (Network Virtual Terminal)
It is a set of rules defining a very simple
virtual terminal interaction. The NVT is used in the start of a Telnet session.
26. What is Gateway-to-Gateway protocol
It is a protocol formerly used to exchange
routing information between Internet core routers.
27. What is BGP (Border Gateway Protocol)
It is a protocol used to advertise the set
of networks that can be reached with in an autonomous system. BGP enables this
information to be shared with the autonomous system. This is newer than EGP
(Exterior Gateway Protocol).
28. What is autonomous system
It is a collection of routers under the control
of a single administrative authority and that uses a common Interior Gateway
Protocol.
29. What is EGP (Exterior Gateway Protocol)
It is the protocol the routers in
neighboring autonomous systems use to identify the set of networks that can be
reached within or via each autonomous system.
30. What is IGP (Interior Gateway Protocol)
It is any routing protocol used within an
autonomous system.
31. What is Mail Gateway
It is a system that performs a protocol
translation between different electronic mail delivery protocols.
32. What is wide-mouth frog
Wide-mouth frog is the simplest known key
distribution center (KDC) authentication protocol.
33. What are Dig rams and
The most common two letter combinations are
called as dig rams e.g. th, in, er, re and an. The most common three letter
combinations are called as trig rams. e.g. the, ing,
and, and ion.
34. What is silly window syndrome
It is a problem that can ruin TCP
performance. This problem occurs when data are passed to the sending TCP entity
in large blocks, but an interactive application on the
receiving side reads 1 byte at a time.
35. What is region
When hierarchical routing is used, the
routers are divided into what we call regions, with each router knowing all the
details about how to route packets to destinations
within its own region, but knowing nothing
about the internal structure of other regions.
36. What is multicast routing
Sending a message to a group is called
multicasting, and its routing algorithm is called multicast routing.
37. What is traffic shaping
One of the main causes of congestion is
that traffic is often busy. If hosts could be made to transmit at a uniform
rate,congestion would be less common. Another open loop
method to help manage congestion is forcing
the packet to be transmitted at a more predictable rate. This is called traffic
shaping.
38. What is packet filter
Packet filter is a standard router equipped
with some extra functionality. The extra functionality allows every incoming or
outgoing packet to be inspected. Packets meeting
some criterion are forwarded normally.
Those that fail the test are dropped.
39. What is virtual path
Along any transmission path from a given
source to a given destination, a group of virtual circuits can be grouped
together into what is called path.
40. What is virtual channel
Virtual channel is normally a connection
from one source to one destination, although multicast connections are also
permitted. The other name for virtual channel is virtual circuit.
Next Part coming soon...
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