- How are DNS servers maintained?
- Why do we need a DNS?
- What is one vulnerability of DNS and how is that vulnerability attacked?
- Why don’t we need to know the IP addresses for our favorite sites?
- Is DNS a protocol?
- Why don’t we all maintain our own DNS?
- How many name servers should be visited?
- Why do we need DHCP?
- What is a top level domain name?
Why do we need a Domain Name System?
Domain Name System allows users to have the same url or consistent domain name while IP addresses change frequently.
We need DNS because without it users would need to keep on checking the IP addresses of others and of themselves to send messages or view sites.
How are DNS servers maintained?
Domain Name Servers (DNS) are the Internet’s equivalent of a phone book. They maintain a directory of domain names and translate them to Internet Protocol (IP) addresses. Host companies and Internet Service Providers interact with the Central Registry on a regular schedule to get updated DNS information.
Why do we need a DNS?
DNS (Domain Name Server) is mainly used to convert human meaningful name (domain name) to computer meaningful name (IP address) in Internet. It allows you to use internet more easily by allowing you to specify a meaningful name on your web browser instead of using IP address.
What is one vulnerability of DNS and how is that vulnerability attacked?
Cache poisoning – the attacker corrupts a DSN server by replacing a legitimate IP address in the server’s cache with that of another, rogue address in order to redirect traffic to a malicious website, collect information or initiate another attack. Cache poisoning may also be referred to as DNS poisoning.
Why don’t we need to know the IP addresses for our favorite sites?
Because we have the domain name system (DNS). It registers friendly names, e.g., google.com that represent IP addresses. Your computer will consult a DNS service to query the IP address for a domain name you enter, and under-the-hood the connection is made to the IP address.
Is DNS a protocol?
(Although many people think “DNS” stands for “Domain Name Server,” it really stands for “Domain Name System.”) DNS is a protocol within the set of standards for how computers exchange data on the internet and on many private networks, known as the TCP/IP protocol suite.
Why don’t we all maintain our own DNS?
Why do we need a Domain Name System? Domain Name System allows users to have the same url or consistent domain name while IP addresses change frequently. We need DNS because without it users would need to keep on checking the IP addresses of others and of themselves to send messages or view sites.
How many name servers should be visited?
At a minimum, you’ll need two DNS servers for each Internet domain you have. You can have more than two for a domain but usually three is tops unless you have multiple server farms where you would want to distribute the DNS lookup load.
Why do we need DHCP?
The main purpose of DHCP is to automate the management and configuration IP addresses across a network, so that IPs don’t need to be manually assigned by an admin each time a device connects. DHCP is also responsible for the configuration of domain name server (DNS) and subnet masks, as well as default gateways.
What is a top level domain name?
A top-level domain (TLD) is one of the domains at the highest level in the hierarchical Domain Name System of the Internet. The top-level domain names are installed in the root zone of the name space. For example, in the domain name www.example.com, the top-level domain is com.