Which of the following is not a secondary memory of the computer?

1. Hard Disk Drive (HDD)
2. Floppy Disk (FD)
3. Cache Memory
4. Compact Dick (CD)
Select the correct answer using the codes given below:

Which of the following is not an internet protocol?

1. TCP/IP 
2. HTTP
3. Gopher
4. STPI
Select the correct answer using the codes given below:

Consider the following statements about WI max:

$1$. It stands for World Wide Interoperability for Microwave Access.
$2$. Wi max surpasses the $30$ m wireless range of a conventional Wi-Fi Local Area Network(LAN), offering a metropolitan area network with a maximum signal radius of $5$ km.
$3$. It has been designed to provide $30$ to $40$ MBPS data rates up to $1$ GBPS for fixed stations.
Which of the statements given above are correct?

Consider the following statements:

$1$. The narrowband ISDN is based on a $64$ KBPS channel as the basic switching unit, while broadband ISDN supports very high data rates ($100$s of Mbps).

$2$. Narrowband ISDN has a circuit switching orientation, and broadband ISDN has a packet switching orientation.

$3$. Broadband refers to telecommunication in which broadband frequencies are available; information can be multiplexed and sent concurrently on many bands' frequencies or channels.

Which of the statement(s) given above is/are correct?