Answer / jitendera kumar sinha

hello friends i have a request if you are going to mark any
answer no then plz place yours answer but if you have any
confusion on that answer put your confusion here we are here
for share our knowledge not for putting each other to finger out
as any one mark my answer wrong then he should pleased his
remark that on what point of view he is marking my answer
wrong as i do that before marking any answer no if it look
like wrong according to me then i put my explanations. and
it will increase your knowledge as well as me.if you are not
agree with that put mark no without explanation. if yes then
mark yes without explanation(u can provide on your wish)

Answer / jitendera sinha

There are some rules of thumb for Cisco router OSPF designs:

A router should be in at most 3 areas (and watch your CPU
and RAM).
An area should contain 50 to 100 routers (I've also seen 25
in some Cisco documents).
A router should have fewer than 60 neighbors.

so shain your expalnation is wrong this is an interview
question and its comes from expernce

Answer / jitendera sinha

on the behalf of question asked by shain on my answer

if your network has fewer than 50 to 100 routers, you may
be able to just have one big (happy?) area 0.

When you try a real OSPF design, you'll find that OSPF area
0 tends to grow on you. I've been calling this the "vacuum"
effect: OSPF area 0 almost seems to pull links into it,
until you find your design is all one big area 0, and you
have to start over. My advice is to keep OSPF area 0 small.
If area 0 is small, it's easy to keep it robust. I prefer
to put the links connecting to non-backbone areas into
those areas, and keep them out of area 0

jitendera kumar sinha
network and security admnistrator

Answer / shahin

"A router should be in at most 3 areas"...... Cud u explain
this statement..!!!!

Answer / harish kumar

OSPF is a link-state routing protocol. Which is required a hierarchical network structure and the structure divided into area like backbone area, regular area, and stub area. Every area must be connected to area 0 or backbone area. Each router can communicate with in an area and area id should be same for an area routers. If an router want to communicate with the other area router it must be connected through ABR router.

Answer / shahin

Well.. This is not a CCNA based question. It an nterview
question asked to me, though i went there on CCNA based. I m
trying to explain here...

There are few rules of router applicable only in OSPF. these
are -

a. An internal router (IR) has all the interfaces within an
area.

b. A backbone router (BR) has at least one interface
assigned to area zero (Area o).

c. An area border router (ABR) has interfaces connected to
two or more areas.

d. An autonomous system boundary router (ASBR) has interface
in inside & outside the OSPF routing domain.

Classful routing protocols do not include subnet masks in their routing updates. Which of the following routing protocols are considered classful? A.) EIGRP B.) OSPF C.) TCP D.) IGRP E.) RIP F.) IP

2 Answers  

Which command loads a new version of the Cisco IOS into a router? A. copy flash ftp B. copy ftp flash C. copy flash ftp D. copy tftp flash

2 Answers  

HI ALL , wanted to know if the rstp protocol.. rapid spanning tree protocol .. is imp to study with ccna's point of view or study of STP will be enough.. in some books rstp is nt given like todd lamle however in icnd2 its explained in detail.. please suggest asap .. thanks ..

2 Answers  

Which layer allows multiple Ethernet devices to uniquely identify one another on the Datalink layer? A.) Transport B.) Session C.) Network D.) Datalink - MAC Sublayer E.) Datalink - LLC Sublayer

3 Answers  

What are four benefits that can result from applying ISDN networking? (Choose four) A. Full time connectivity across the ISDN is spoofed by Cisco IOS routers using dial on demand routing (DDR) B. Small Once and Home Once sites can be economically supported with ISDN Basic Rate Interface (BRI) servkps C. ISDN replaces Signaling System 7 (SS7) in the Public Switched Telephone Network (PSTIC) backbone D. ISDN can be used as a backup service for a leased line connection between the remote and central chaps E. Modem racking and cabling can be eliminated by integration of digital modem cards on Cisco IOS Network Acess Servers (NAS)

2 Answers  

What are four functions/characteristics of the network layer of the OSI model? (Choose four) A. It uses a two-part address B. It maintains routing tables C. It uses broadcast addresses D. It establishes network addresses E. It provides access to the LAN media F. It provides media independence for upper layers G. It provides path selection for Internetwork communication

1 Answers  

Hey Folks how are you i guess some of guys are newly visitors of this site so let me introduce my self. I am jitendera kumar sinha working for cisco system (india)( Network engineer L2) and i was also a regular Visitors of this site and i have provided lots of answer and i do not know how many are correct :-) By the way i am here again to learn some thing and share my knowledge which is beyond CCNA Scope and and it is some where related to ccnp ( switching )and ccnp Security as i am pursuing ccnp security so i am going to start the topics from switching and will share my knowledge and try to brush-up my knowledge.... so let me know any topic in switching where you are facing difficulty and i will try to solve it so please post one topic and i will reply weekly as i am getting time on Sunday only

1 Answers   Tech Mahindra,

Which command, that is used to test address configuration, uses Time-To-Live (TTL) values to generate messages from each router. A) telnet B) ping C) trace D) bootp

4 Answers  

What command will display all connected OSPFv2 routers?

1 Answers  

In static route, what is the difference between next hop ip address and local interface address, except the Administrative Distance.

5 Answers   HCL,

Tell me how much internal and external ad of eigrp protocol?

0 Answers  

Is hub intelligent device?

0 Answers