Answer:
39 + 3
42
393
Explanation:
In this line System.out.println("39 + 3"), the quotation marks are used to delimit a string, then when printed in the console the string is printed as-is.
In the next line: System.out.println(39 + 3), without the quotation marks, the 39+3 is treated as a normal addition and prints the result of the operation.
In the last line printed with the code System.out.println("39" + 3,; the symbol + is used to concatenate the string 39 with the number 3, since the string has no spaces they are printed together.
Answer:
The data-link layer
Explanation:
The physical layer and data-link layer are often confused a lot especially in terms of what they do in the TCP/IP 7 layer protocol. The physical layer as the name suggests represents the physical devices like the cables and the connectors that join or interconnect computers together. This layer is also responsible for sending the signals over to other connections of a network. The data-link, on the other hand, translates and interprets these sent binary signals so that network devices can communicate. This layer is responsible in adding mac addresses to data packets and encapsulating these packets into frames before being placed on the media for transmission. Since it resides in between the network layer and the physical layer, it connects the upper layers of the TCP/IP model to the physical layer.
Answer:
Ethernet standards are written and maintained by the IEEE, the Institute of Electrical and Electronic Engineers which has its corporate office in New York City and its operations center in Piscataway, New Jersey.
Explanation:
Explanation:
Acid rain can cause serious problems for many different animals and plants. As a result, the entire food web is affected. For example, acid rain can cause phytoplankton in lakes to die. Insects, which rely on phytoplankton for food, now have less food to eat, and they begin to die as a result.
