Server interview questions and answers -3

Server interview questions and answers 

If DHCP is not available what happens to the client

Client will not get IP and it cannot be participated in network . If  client already got the

IP and having lease duration it use the IP till the lease duration expires.

what is the process of DHCP for getting the IP address to the client

There is a four way negotiation process b/w client and server

DHCP Discover (Initiated by client)

DHCP Offer (Initiated by server)

DHCP Select (Initiated by client)

DHCP Acknowledgement (Initiated by Server)

DHCP Negative Acknowledgement (Initiated by server if any issues after DHCP offer)

what is the difference between Authorized DHCP and Non Authorized

DHCP?

To avoid problems in the network causing by mis-configured DHCP servers, server in windows 2000 must be validate by AD before starting service to clients. If an authorized DHCP finds any DHCP server in the network it stop serving the clients 

what are the problems that are generally come across DHCP

Scope is full with IP addresses no IP’s available for new machines

If scope options are not configured properly eg default gateway

Incorrect creation of scopes etc

What is the db name of the dhcp file and where it is stored?

a. Dhcp.mdb is the database name of the DHCP.

b. %SystemRoot%\system32\dhcp\dhcp.

Can we configure Backup of DHCP server?

Backup of DHCP database

Open DHCP

1. In the console tree, click the applicable DHCP server.

    Where DHCP/applicable DHCP server

2. On the Action menu, click Backup

3. In the Browse For Folder dialog box, select the folder where you want to store

    the backup DHCP database, and then click OK.

What is superscope, scope and multiscope?           

Scope: A range of IP addresses that the DHCP server can assign to clients that

are on one subnet.

Superscope: A range of IP addresses that span several subnets. The DHCP

server can assign these addresses to clients that are on several subnets.

Multicast scope: A range of class D addresses from 224.0.0.0 to

239.255.255.255 that can be assigned to computers when they ask for    

them.  A multicast group is assigned to one IP address. Multicasting can   

be used to send messages to a group of computers at the same time  

with only one copy of the message. The Multicast Address Dynamic

 Client Allocation Protocol (MADCAP) is used to request a multicast

 address from a DHCP

If a client is not able to get an IP from a DHCP server, what will be the cause

 assuming that physical network is working fine?

Scope not activated or DHCP server not authorized in the domain

If multiple scopes present activate correct scope

Describe how the DHCP lease is obtained.

 It’s a four-step process consisting of (a) IP request, (b) IP offer,

 © IP selection and (d) acknowledgement.

We’ve installed a new Windows-based DHCP server, however, the

 users do not seem to be getting DHCP leases off of it.

The server must be authorized first with the Active Directory.

How can you force the client to give up the dhcp lease if you

Have access to the client PC?

Ipconfig/release

What’s the difference between forward lookup and reverse

 lookup in DNS?

 Forward lookup is name-to-address, the reverse lookup is address-to-name.