Modems provide a bridge between the analog and digital worlds, offering digital systems the ability to communicate over older transmission technologies. In this video, learn about the types of modems that are used in different environments and the security considerations surrounding the use of these devices.
- [Instructor] Modems provide a bridge…between the analog and digital worlds,…offering digital systems the ability to communicate…over older analog transmission technologies.…The word modem is an abbreviated form of two words…that describe the functions that a modem performs,…modulator and demodulator.…A modem converts a signal from digital form…to an analog form, such as audio, electrical impulses,…or whatever is required by the transmission media.…
This is called modulation.…On the other end of the connection,…a modem converts that analog transmission back…to digital form, a process called demodulation.…The earliest modems were used to connect computers…to telephone lines that were designed…to carry audio signals.…The device shown here, known as an acoustic coupler,…converted signals from a computer to sound,…literally allowing computers to speak to each other…over telephone lines.…This technology quickly matured a little bit,…getting rid of the need to attach a telephone handset…to the computer and allowing users…
Note: This course is part of a series releasing throughout 2018. A completed learning path of the series will be available once all the courses are released.
- How IP addresses are assigned and managed
- Multilayer protocols
- VPNs and VPN concentrators
- Designing secure networks
- Firewall management techniques
- Maintaining network availability
- Software defined networking (SDN)
- Port isolation
- Network attacks
- How Wi-Fi networks function
- WPA, WPS, and propagation attacks
- Host-based network security control
Skill Level Advanced
Insights from a Cybersecurity Professionalwith Mike Chapple32m 15s Appropriate for all
1. TCP/IP Networking
2. Network Security Devices
3. Designing Secure Networks
4. Specialized Networking
5. Secure Network Management
6. Virtualized Networks
Port isolation1m 47s
7. Network Attacks
8. Transport Encryption
9. Wireless Networking
10. Host Security
- Mark as unwatched
- Mark all as unwatched
Are you sure you want to mark all the videos in this course as unwatched?
This will not affect your course history, your reports, or your certificates of completion for this course.Cancel
Take notes with your new membership!
Type in the entry box, then click Enter to save your note.
1:30Press on any video thumbnail to jump immediately to the timecode shown.
Notes are saved with you account but can also be exported as plain text, MS Word, PDF, Google Doc, or Evernote.