Answer:
All of them execpt five and three.
Explanation:
It is okay to have social media and receive messages.
Answer:
Differ in the quality of their transmission.
Explanation:
For example, when using the public phone box, wired transmission is done not wireless as in cell phones. Public phone box use electronic signals transmitted through a cable network to send voice data which are not very effective for long distance communication.
However, cell phones wirelessly send electromagnetic wave signal to a cell tower close to the caller and then the information is then transmitted to cell tower close to the receiver within a split of a second. This method of communication has much advantages.
Answer:
a combined device for modulations and demodulations
Answer:
c.Update DNS records dynamically for DHCP clients that don't request updates.
Explanation:
A DNS server is a computer server that contains a database of public IP addresses and their associated host names, and in most cases serves to resolve, or translate, those names to IP addresses as requested.
A DHCP Server is a network server that automatically provides and assigns IP addresses, default gateways and other network parameters to client devices.
Dynamic DNS is a method of automatically updating a name server in the Domain Name Server, often in real time.
Answer:
var birthday = "12/2/1978";
Explanation:
It does not create a date object named birthday because in this statement the birthday is a string which contains 12/2/1978 a date it is not date object it is a string.All other three options are correct way to create a date object.
var birthday = new Date();
creates a date object with the current date and time.
we can also pass date string in the new Date().So var birthday = new Date("12/2/1978"); is also correct.
we can also pass year,month,day in new Date() In this order only.So option fourth is also correct.
