Already have an account? Get multiple benefits of using own account!
Login in your account..!
Remember me
Don't have an account? Create your account in less than a minutes,
Forgot password? how can I recover my password now!
Enter right registered email to receive password!
DNS Records and Messages
Two types of records are used DNS. The question records are used in the question section of the query and response messages. The resource records are used in the answer authoritative and additional information sections of the response message.
Question Record: A questions records in used by the client to get information from a server. This contains the domain name.
Resource Record: Each domain name is associated with a record called the resource record. The server database consists or resource returned by the server to the client.
A resource records is a quadruple that contains the following fields.
Name , Value , Type , TTL
TTL is the time to live of the resource records. It determines when a resource should be removed from a cache form a cache. In the example records given below we ignore the TTL field.
The meaning of name and value depend on type:
If a DNS server is authoritative for a particular host name then the DNS server will contain a type a record for the hostname. If a server is not authoritative for a hostname then the server will contain a type NS record for the domain that includes the hostname. It will also contain a Type a record that provides the IP address of the DNS server in the value field of the NS records. As an example suppose an edu TLD server is not authoritative for the host gain cs un mass edu. Then this server will contains a record for a domain that includes the host cs mass. Edu. For example ( umass edu dns unmass. Edu NS) the du TLD server would also contain a Type a record which maps the DNS. Server dns umass.edu to an IP address for example ( dns umass edu 128.119.111A)
I Have an exam Questions and i would like it to be answered. Thanks
How do packets and timers in EIGRP work?
What are the benefits of Networking? The following are the distinct notes in favor of computer networking. a. The computers, staff and information can be well managed b.
- The project should include a web server, and an example webpage - Webserver should continue to accept multiple requests from client browser - Webserver should print out logs: how
Explain teh term- Bits and Bitmap Many tiny dots, which are put together to make a picture. Bits are combined to make a graphic image called a bitmap. GIF and JPEG files are
Distributed Shared Memory (DSM) systems copy a shared memory abstraction on loosely coupled architectures in order to allow shared memory programming despite missing hardware suppo
Q. Illustrate about RSA Encryption? RSA Encryption - Public key encryption technique - Encryption steps: - Encode data to be encrypted as a number to create the pla
In the transaction server, the client component usually consists of GUI and the server components usually having of SQL transactions against a database. These applications are know
Explain about the Switches LAN switches are an expansion of the method in LAN bridging, which controls data flow, handles transmission errors, gives physical addressing, and ma
Prepare the Network Step 1: Disable all ports by using the shutdown command. Ensure that the initial switch port states are inactive with the shutdown command. Use the inter
Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!
whatsapp: +91-977-207-8620
Phone: +91-977-207-8620
Email: [email protected]
All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd