shahin


{ City } hyderabad
< Country > india
* Profession *
User No # 22151
Total Questions Posted # 26
Total Answers Posted # 107

Total Answers Posted for My Questions # 102
Total Views for My Questions # 450393

Users Marked my Answers as Correct # 1365
Users Marked my Answers as Wrong # 212
Questions / { shahin }
Questions Answers Category Views Company eMail

What is the difference between DTE & DCE???

ISDN, Wipro,

12 CCNA 65727

What is CSU/DSU & explain the function????

Cisco,

6 CCNA 24726

Write an access list line which will deny node 20.0.2.1 to anywhere on your network using DNS via UDP. Don't worry about the other access list lines.

2 CCNA 3586

You have OSPF traffic flooding your network via one of your router interfaces. Write the access list line that will deny all ospf traffic. Don't worry about the other lines of the access list.

 1 CCNA 3660

How to see the running-config & startup-config infor from global configuration mode. As we know, from priviledge mode we cn see it by executing command. i.e. Router#show running-config and Router#show startup-config Now wat is the coommands use in global configuration mode o see those info. Router(Config)# ??????

Juniper Networks,

4 CCNA 6356

You want to clear the outputs on your serial interface showing errors on the interface. Which command do you type?

 1 CCNA 4026

Which command will show you if you have a DTE or DCE cable connected to an interface?

DFSS,

4 CCNA 27501

Write out a config to permit only the below MAC address to pass traffic through a port on your switch. mac-address 0005.1b00.5b58

 4 CCNA 4279

Hi Guys I am facing one problem while configuring PAP over Point to Point links. Configuration scenario is like this. ROUTER 1: (Hostname – R1) R1(config)#username R2 password CCNA2 R1(config)#interface serial 1/1 R1(config-if)ip address 10.0.0.1 255.0.0.0 R1(config-if)#lock rate 64000 R1(config-if)#encapsulation ppp R1(config-if)#ppp authentication pap R1(config-if)#ppp pap sent –username R1 password CCNA1 R1(config-if)#no shutdown ROUTER 2: (Hostname – R2) R2(config)#usename R1 password CCNA1 R2(config)#interface serial 1/1 R2(config-if)#ip address 10.0.0.2 255.0.0.0 R2(config-if)#encapsulation ppp R2(config-if)# ppp authentication pap R2(config-if)# ppp pap sent –username R2 password CCNA2 R2(config-if)#no shutdown Now problem is that, after configure the command “ppp authentication pap” the “Line protocol” status goes down on each router. But when I disable this command using “no ppp authentication pap”, the “Line Protocol” status goes up. What could be the problem, can anyone explain it plzzz….!!! Thanks in Advance…!! Shahin..

6 CCNA 7451

Port selection is done at which layer of OSI reference model?????

 4 CCNA 4933

What is the difference between RIP & RIPng???? Can anyone explain it..!!! Thank u in advance.

 1 CCNA 17569

What is the meaning of PASSIVE interface in RIP, IGRP, EIGRP & OSPF?? Can any one explain..!!!

 6 CCNA 22391

What is the difference between OSPF Exteral Type 1 (O E1) & External Type 2 (O E2) routes????

 4 CCNA 28814

Can anyone explain the Split Horizon rule in RIP & also Split Horizon with Poison reverse. Jitu.... U knw wat i expect.. hehehehehe...

 2 CCNA 10722

What are the difference between IPv4 & IPv6?? Can anyone explain more details about it..!!

HCL,

9 CCNA 17753

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Answers / { shahin }

Question { 26777 }

How many access lists are allowed per interface?

A. One per port, per protocol

B. Two per port, per protocol

C. Unlimited

D. Router interface +1 per port.


Answer

The correct answer is B

We can configure two ACL per interface.

a) One in inbound direction &

b) One in outbound direction.

So two ACL per interface.

Is This Answer Correct ?    40 Yes 9 No

Question { 5614 }

Identify the hardware component that stores the bootstrap
program?

A.) ROM

B.) NVRAM

C.) Booter load

D.) RAM

E.) Flash


Answer

a) ROM contains -

POST, Bootstrap, and startup/power-up utilities (usually
limited version of), Image of Cisco IOS.

b) Flash contains -

Cisco IOS.

c) NVRAM contains -

Startup configuration.

d) RAM contains -

Routing Table, Running configuration, Active program & IOS
instruction.

Is This Answer Correct ?    2 Yes 0 No


Question { 8981 }

Of the following switching types, which one has the highest
latency?

A.) Cut-through

B.) None

C.) Store-and-forward

D.) Fragment Free


Answer

Store-and-forward method has highest latency.

As it pulls the whole frame into its buffer & then check the
CRC. It takes time to pull frame in buffer & check CRC.

This is default switching method for all DISTRIBUTION LAYER
switches.

Bridge support only Store-and-Forward switching method.

Is This Answer Correct ?    0 Yes 0 No

Question { 3905 }

With distance vector routing protocols, it is never useful
to send

the same routing update packet back out the same interface
that it was

learned. This concept is called what?

A.) Holddown timers

B.) Poison Reverse

C.) Count to infinity

D.) Split Horizon

E.) Link State


Answer

The concept is called Split Horizon.

It is used to avoid rooting loops in a network.

Basic principle is - "Information about routing path for a
particular packet is never sent back on the interface from
which it was received".

In simple sense, we can say "DON'T TELL ME WHAT I JUST TOLD YOU"

Is This Answer Correct ?    0 Yes 0 No

Question { 7037 }

Identify the 2 commands that copies the configuration in
NVRAM to

RAM?

A.) copy backup-config running-config

B.) configure nvram

C.) copy startup-config running-config

D.) configure memory


Answer

Out of two command, one i know.

a) Router# copy startup-config running-config

b) ??????????????


Cud anyone explain the nest command...!!!

Is This Answer Correct ?    1 Yes 0 No

Question { 5470 }

What should be the first command to create an access-list that

prevents all users on subnetwork 10.10.128.0, using subnet mask

255.255.192.0, from being

able to telnet anywhere?

A.) access-list 101 deny tcp 10.10.128.0 0.0.63.255 any eq
telnet

B.) access-list 101 deny tcp 10.10.128.0 255.255.0.0 any eq
telnet

C.) access-list 101 deny tcp 10.10.128.0 255.255.192.0 any
eq telnet

D.) access-list 101 deny tcp 10.10.128.0 0.0.192.255 any eq
telnet

E.) access-list 101 deny tcp 10.10.128.0 0.0.128.255 any eq
telnet

F.) access-list 101 deny tcp 10.10.128.0 0.0.127.255 any eq
telnet


Answer

Mr Tahir, Ur answer is wrong. As of no subnet mask is used
in ACL. It use WILD CARD MASK.

So correct answer wud be A.

access-list 101 deny tcp 10.10.128.0 0.0.63.255 any eq

Is This Answer Correct ?    1 Yes 1 No

Question { 17094 }

Identify the switching method that receives the entire frame
then

dispatches it?

A.) Cut-through

B.) Receive and forward

C.) Store and forward

D.) Fast forward


Answer

Store & Forward

Is This Answer Correct ?    7 Yes 0 No

Question { 7306 }

What is the command to start IP RIP version 1 routing on a
Cisco router?

A. show rip

B. enable rip

C. router enable

D. router rip


Answer

Mr. Danish, Cud u justify ur answer. If yes.. thn plzz
justify it. I m eagerly waiting for ur response.

Is This Answer Correct ?    2 Yes 2 No

Question { Patni, 6081 }

where can we see the OS in the system?


Answer

We can see OS in the system from SYSTEM PROPERTISE wizard.

Right Click on MY COMPUTER - PROPERTIES - On GENERAL tab,
we can get all information about system OS, OS version.
Hardware information, just like CPU speed, RAM size

Is This Answer Correct ?    21 Yes 0 No

Question { IBM, 149816 }

What are the advantages and disadvantages of router


Answer

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.

Is This Answer Correct ?    460 Yes 75 No

Question { 8742 }

Can you perform the OSI model seven layer functions in
either two layer or three layer.


Answer

No, It is not possible to perform all function in either
two or three layer. Because every layer has its own
specification, so we can't merge them in two or three layer.

Is This Answer Correct ?    9 Yes 0 No

Question { IBM, 18976 }

What is flow and error control?


Answer

Flow Control: -
In communications, the process of adjusting the flow of
data from one device to another to ensure that the
receiving device can handle all of the incoming data. This
is particularly important where the sending device is
capable of sending data much faster than the receiving
device can receive it.

Error Control: -
Error control is a method that can be used to recover the
corrupted data whenever possible. There are two basic types
of error control which are backward error control and
forward error control. In backward error control, the data
is encoded so that the encoded data contains additional
redundant information which is used to detect the corrupted
blocks of data that must be resent. On the contrary, in
forward error control (FEQ), the data is encoded so that it
contains enough redundant information to recover from some
communications errors.

Is This Answer Correct ?    55 Yes 2 No

Question { 4328 }

Hi-
Salmaan my name is Shadab Khan and nick Khangkp
ok salmaam plz tell me about of NAT plz


Answer

NAT(Network Address Translation):
a) It is an internet standard which allow us to use one set
of IP address for internal traffic & another set of IP
address for external traffic.

b) NAT translate private IP address to public IP address.

c) IP address translation occur where LAN interface with the
internet.

d) NAT converts the packet header (In some cases port number
also) for incoming & outgoing traffic.

Is This Answer Correct ?    1 Yes 0 No

Question { Aricent, 11800 }

consider any webaddress. for example http://www.yahoo.com.
what are the protocols are used and what are the osi layers
are involved in this webaddress?


Answer

If we just write this web address on address bar & Press
ENTER,As far as my concern, Protocol Used in this case -

a) HTTP
b) WWW
c) DNS

All 7 layers will involve in this process.

If I m wrong, plzzzz let me knw wats right. I'l be thankful to
u.

Is This Answer Correct ?    0 Yes 10 No

Question { CMS, 23429 }

i forget the startup password on Windows XP how to remove?


Answer

Hi.. i don't hv much idea about Microsoft OS, still i m
trying to explain it. Hope it'll be helpful for u.

a) Insert WIN XP CD & let boot from CD.

b) Don't do fresh intsall. Repair the OS. U can find the
REPAIR option on partition information wizard. i.e. where u
select ur drive where to install OS. On that page u can find
REPAIR option. Press on that & let the process to continue.

c) After copying all the files, it will restart ur PC. after
that graphical wizard will appear. On that wizard, You just
press -

Shift + F10. Command prompt will start. On that we have to
type one line command. The command is -

net user administrator (New Password) ! blank

after that press enter. Let the window to finish the repair.

d) After completion of repair, the OS will start without
password. U can set the new password.

Thanks & Regards
Shahin

Is This Answer Correct ?    3 Yes 9 No

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