Answer:
Phishing
Explanation:
Phishing is a type of cyber attack in which the attacker masquerades as a trusted entity via e-mail and trick the recipient into clicking a malicious link that could steal user data including login details, credit card information e.t.c A phishing attack can have devastating effects such as Identity theft, Unauthorised purchase or stealing of funds on individuals.
The common types of phishing are<em>: Vishing, Smishing, Email Phishing, Search Engine Vishing, Whaling</em> e.t.c
Answer: Well known ports
Explanation:
DHCP server transmit the response to the dynamic host configuration server protocol (DHCP) clients. DHCP default port is 67 and its port number is greater than the user data-gram specific port.
FTP server has its default listen at port 21 and file transition protocol(FTP) uses two transmission control protocol(TCP) connection for communication in the network. FTP passes information in port number 21, which is only used to send control information.
Well known port are use to identify the service of network on the public internet and private internet network. Therefore, port 21 and 67 are the well known ports.
<h2>double, long, float, short, byte</h2>
Explanation:
The given data types are built-in types. According to java, the following holds right to justify the order.
Double:
- This occupies 64 bits
- It can hold decimal values
- Example: "1.23456e300d, -1.23456e-300d, 1e1d"
Float:
- It occupies 32 bits
- Holds decimal values
- Example: "1.23e100f, -1.23e-100f, .3f, 3.14F"
Long:
- It occupies 64 bits
- Example: "-2L, -1L, 0L, 1L, 2L"
Short:
- It occupies 16 bits
- Stores twos complement integer
Byte:
- Stores twos complement integer
Calc or Excel is the application best suited for this effort.
