Join Mike Chapple for an in-depth discussion in this video Domain Name Service, part of CompTIA Security+ Exam Prep (SY0-401): Network Security.
- [Voiceover] 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, 188.8.131.52.…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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- Working with the TCP/IP suite
- Securing switches and routers
- Configuring firewalls
- Setting up virtual private networks (VPNs)
- Detecting and preventing network intrusions
- Implementing unified threat management
- Using public and private network addressing effectively
- Segmenting networks
- Virtualization and cloud computing
- Managing secure networks
Skill Level Intermediate
1. TCP/IP Suite
2. Network Security Devices
3. Designing Secure Networks
4. Cloud Computing and Virtualization
5. Managing Secure Networks
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