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)
Reference models Designing implementing and manufacturing computer networks and related devices are very complex activities. Therefore in order for this technolog
This is one of the models based on PRAM. In this, the processors access the memory location parallel for reading while exclusively for writing operations. In the algorithm which u
Q. What is Aspects of Security? - Security Attack: Any action whichcompromises the security of information owned by an organization. - Security Mechanism: A mechanism th
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
INTRODUCTION This part discusses the additional requirements at software levels and operating system which will create the parallel programs run on parallel hardware. Collecti
State the methods to keep the attackers at bay Another best methods to keep the attackers at bay is known as network address translator or NAT. The philosophy behind the design
What does a Standard IP Access-list use as test criteria Ans) Standard IP access list use only source address.
flowchart
What are General Middleware? It contains the communication stacks, authentication services, distributed directories, network time, RPC, Queuing services with the network OS ext
Linear Array: This is a most basic interconnection pattern. Processors are connected in a linear one-dimensional array. The first as well as last processors are attached with one a
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