Questions in: Network & Telecom

administrator

In a Company Or A Organization the Users Login Security
Given By Administrator.

Frame

The Data Link Layer encapsulates the network-layer
information in a PDU called segment protocol data unit.

Flash memory stores the IOS & NVRAM stores startup config

NVRAM is used to store the "Start-up" configuration.
The Cisco IOS® software image is stored in Flash memory
(usually in compressed form), but it is loaded into RAM
before being executed by the router. Because the running
software image then resides in RAM, a new software image
can be downloaded and copied over the software image stored
in Flash memory
Correct me, if it is wrong?

Initiate data exchanges
May upload data to serves

1.Bridges
It connect 2 or more LANS
2.Hub
It connects hosts.It has number of input and output.Frames
arriving are send out to all others
3.Reapeters
Same as hub.But amplify incoming signals

network components like hub swicth repeater router
hub it forward any data in segment it speed slow
swicth it forward data to approprit port speed high
compare then hub
repeater use for rgernate the singnal
router use to connect two different ip adderss

False
Domain user can set only one password.

False
Domain user can set only one password, can't set muliply
password.

Brouter is Bridge Router.It function as router & bridge.

Brouter is Bridge Router.It function as router & bridge

Advantage of Router -
a) Router limits the collision domain.
b) Router can function on LAN & WAN>
c) Router can connects different media & architectures.
d) Router can dtermine best path/route for data to reach
the destination.
e) Router can filter the broadcasts.
Diadvantage of Router -
a) Router is more expensive than Hub, Bridge & Switch.
b) Router only waork with routable protocol.
c) Routing updates consume bandwidth.
d) Increase latency due to greater degree of packet
filtering.

Hi,
The Advantages and Disadvantages of NIC card is
1)NIC Card helps for communication between 2 systems
(Advantage).
2)NIC Card helps to connect to Remote Systems.(Advantage)
3)NIC Card data can be transffered from one system to
another(DisAdvantage).
4)NIC Card data is not secure.

Hi,
NIC stands for Network Interface Card,Advantages and
DisAdvantages of NIC are as follows:
If NIC Card is present then data flow is possible and if
NIC card is not available Data flow is Not possible between
Networks NIC Card is provided with Port RJ45 Port and this
is the port through which Data transfer is Possible is
possible in between Networks.The Disadvantage of NIC is
Data is not secured in NIC Connection as Data can be Hacked.

Advantages:
1. More useful in connecting LAN with the Internet
2. Speed depends on the cost
Disadvantages:
1. Acts just as a interface between LAN and Internet
2. No traffic maintenance is present

Slow speed when compared to hub
Limited no of systems can be connected max-8 or 12

Advantage:
Hub is less expensive product.
Diadvantages:
It will broadcast to all the ports
It runs half duplex
If 10 Ports in a hub it will share bandwidth of 100 MbPs.
So each port share 10 Mbps

advantage
1.it is used for connect the multiple devices.
2.

there was a post similar to this but i was not able to find
it...
anyway based on the reply on that post there are 3 reasons
1. When a system is visualized in layers then u are free to
make changes in any one layer and be assured that other
layers are not affected
2. It makes troubleshooting simple
3. Layered models give a general idea of the functions of
the layers giving freedom to vendors to bring in their own
innovation otherwise the whole system can be monopolised by
a single vendor...

for stnander our system we make a system and in layer
system we just made a layer and by doing so we can easly
modified and identified the trouble suppose if ip add
having some problem then we can easly go to 3rd layer and
rectify the problem and by doing so the other layers will
be not effective.

1. bit stuffing
2. LRC
3. CRC
4. parity check
here 1 2 3 are either error detection or error correction
which can be potentially done by DataLink Layer
But bit stuffing (from wikipedia) seems to be done by the
physical layer so that the data arrives at the device
synchronized... (i am not sure of the working but i am sure
that it is a layer1 concept)

LRC is not done by Data Link Layer.
Reason- Bit stuffing is used in DLL to identify the new frame and the older frame which is recognized by adding 0111 at the end of every frame so that receiver will get idea that from this moment new frame will start.
Regarding CRC is used for to check whether data is altered during transmission or not and parity is also doing the same.
So remaining is LRC which is not present at DLL at all.

yes you can install the two operating system in one
computer, in tis case ur coputer will be dual boot.

what is windows 2003xp?

single node topology
bus topology
star topology
ring topology
mesh topology
tree topology
hybrid topology

There are Seven Network Topologies as below:
1. Single Node Topology
2. Star Topology
3. Bus Topology
4. Ring Topology
5. Mesh Topology
6. Tree Topology
7. Hybrid Topology

7 layers in the OSI model
application layer
presentation layer
session layer
transport layer
network layer
data-link layer
physical layer
the meaning of is open system internetwork

OSI model consists of seven layers i.e.
7.application layer
6.presentation layer
5.session layer
4.transport layer
3.network layer
2.data-link layer
1.physical layer
It is called OSI because it is open system interconnection.

Bus topology is one of the types of physical topology. Co-
axial wiring, telephone cable conncetions, twisted pair
ethernet are some of the examples of bus topology.

B
this is the core function of a router
Bridge requires that the protocols be the same...
gateway is just a concept not an actual device... :)

i am sorry but my previous answer might be wrong... gateways
ARE actual devices
Definition
Gateways:
They relay packets among networks that have different
protocols (e.g. between a LAN and a WAN). They accept a
packet formatted for one protocol and convert it to a packet
formatted for another protocol before forwarding it. They
operate in all seven layers of the OSI model.
So i think the answer is C
Sorry once again

a)