Option D is the answer because Digital Certificate is an entity that generates electronic and distributes them upon proving their identity sufficiently. In early days there was issues with people using the certificates that were not even issued by the organizations. Today it's a cryptographic technique which uses digital signatures and gives users a digital certificate that can be authenticated anytime online by any organization and is unique for every user having it.
Option A cannot be the answer because it has nothing to do with the identity of person but rather it is for specific fields.
Option B is not answer because it has no key and score matter to do with it.
Option C Web transactions has nothing to do with the certificates.
 
        
             
        
        
        
if the wide area network (wan) is supporting converged applications like voice over internet protocol (voip) internet protocol (ip) routing lookups will be even more essential to the assurance of the network. 
Understanding WAN
WAN stands for Wide Area Network is a network that is used as a network that connects between local networks.  Local computer networks are not only physically adjacent to each other, but share the same group of IP addresses.  
The local network can be one room, one office or even one city.  While the WAN itself is a network that connects these local networks within a city, province or even between countries.  The difference between WAN and LAN networks is in the type of media used.  Generally local networks or LANs use similar network media.
 While the WAN is connected to devices with different transmission media and protocols.  The WAN coverage area is also very wide, but unites the network as if it were in one room.  WAN networks have lower data transfer rates than local networks or LANs. WAN network technology relies on companies providing long-distance telecommunications services.  WAN networks use many kinds of network technologies with a mix of analog and digital signals for data transmission.  Of course this is different from a local network or LAN which uses a connection between computers that are physically connected to each other with the same protocol and transmission media.  The components in the WAN and their functions will be discussed later.
Learn more about WAN at brainly.com/question/14793460.
#SPJ4.
 
        
             
        
        
        
I used computers for 3 years now and i think its B
        
             
        
        
        
The question is asking to choose among the following choices that state what would the domain in an email represents, base on my research, I would say that the answer would be letter B. location of the destination. I hope you are satisfied with my answer and feel free to ask for more