Answer:
3. ISDN
Explanation:
ISDN ( Integrated Services Digital Network ) -
It is the used for the simultaneous digital transmission of network service , data , video and voice , instead of the old circuits of the public switched telephone network ( PSTN ) , is referred to as ISDN .
The characteristic feature of ISDN is that it integrates the data and speech on the same lines , which is not possible in PSTN .
Hence, from the given information of the question,
The correct option is ISDN .
With the help of Intelligent Character Recognition, the digital version of a document is displayed on the screen for a human viewer to verify letters the software cannot read.
The use of public wireless connections can increase a user's vulnerability to monitoring and compromise. <u>VPN </u> software can be used to encrypt transmissions over public networks, making it more difficult for a user's PC to be penetrated.
Explanation:
- A VPN, or Virtual Private Network, allows you to create a secure connection to another network over the Internet.
- VPNs can be used to access region-restricted websites, shield your browsing activity from prying eyes on public Wi-Fi, and more. .
- Virtual Private Network, is a private network that encrypts and transmits data while it travels from one place to another on the internet. VPNs aren't just for desktops or laptops, you can set up a VPN on your iPhone, iPad or Android phone.
- A VPN encrypts the traffic from your machine to the exit point of the VPN network. A VPN isn't therefore likely to protect you from an adversary like Anonymous.
- VPNs add another layer of encryption to your internet traffic, your latency will go up and speeds will go down.
