The Domain Name Service, or DNS, allows people to use easily recognizable names in place of IP addresses. DNS works as a network service that operates over UDP port 53. Every time you connect to a network, that network provides your computer with the IP address of a local DNS server that it can use to look up IP addresses. In this video, learn how DNS functions.
- (Instructor) Computers use IP addresses…to communicate over the network,…but those addresses are very difficult…for people to remember.…Just imagine if you had to memorize the IP address…of every single web server that you need to access…in a given day.…The Domain Name Service, or DNS, allows people…to use easily recognizable names…in place of IP addresses.…And DNS servers translate those names.…A DNS server can translate a name…that you're more familiar with,…such as www.lynda.com…into the IP addresses…that computers use to communicate…such as 126.96.36.199.…
DNS works as a network service that operates…over UDP port 53.…Every time you connect to a network, that network…provides your computer with the IP address…of a local DNS server that it can use…to look up IP addresses.…Then, whenever you type the domain name of a website…into your browser, your computer sends a request…to the local DNS server asking it for the IP address…associated with that name.…If the server knows the answer to your question,…it simply responds to the request with the IP address…
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- TCP/IP networking
- Network security devices
- Switches and routers
- Content distribution networks
- Storage networks
- Securing networks
- Network attacks
- Wireless networking and security
Skill Level Intermediate
Q: This course was updated on 07/27/2018. What changed?
A: New videos were added that cover network relationships and security device placement.
Insights from a Cybersecurity Professionalwith Mike Chapple32m 15s Intermediate
Networks and communications1m 31s
1. TCP/IP Networking
2. Network Security Devices
3. Designing Secure Networks
4. Specialized Networking
5. Secure Network Management
6. Network Attacks
7. Wireless Networking
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