Answer:
I. circuit switching ==> B) A dedicated connection is formed between two communicating parties
II. PGP==> E)public-key package
III. Handshaking==>D)exchange of control packets between computers
IV. packet switching==> A)breaks information down into pieces that can take different paths
V. ICANN==> C)Allocates IP addresses
Step-by-step explanation:
I. circuit switching ==> B) A dedicated connection is formed between two communicating parties
Circuit switching creates a communication path between two points within the nodes of the network. This path is established by creating physical links between nodes. Logic channels are allocated on each link for the connection. Based on the connection, the specified frequency band is assigned.
II. PGP==> E)public-key package
Public key encryption is an encryption system in which different keys are used for encryption and decryption. Each communicating party has one pair of keys. One of the keys that make up these key pairs is a secret key and the other is a public (non-secret) key. Encryption is performed with one of these keys while decryption is performed with the other. These two key pairs are mathematically linked.The secret key only has one owner. The party having the secret key can decrypt the information encrypted with its public key, generate its own digital signatures or prove its identity through the secret key.The public key is accessible to everyone. Public-key encryption is a very basic and widely used technology. The public key infrastructure is used in protocols such as the TLS (SSL follower) protocol, the PGP protocol used in secure e-mail communication, and the GPG for file encryption and decryption.
III. Handshaking==>D)exchange of control packets between computers
In telecommunications and microprocessor systems, the term handshaking has the following meanings:
-In data communication, a sequence of events governed by hardware or software, which require mutual agreement of the states of operational modes preceding the exchange of information.
-The process used to establish the communication parameters between two stations.
The parallel handshake transmission protocol, used in master-slave architectures, is a variant of the strobe protocol. Unlike the latter, there are two control lines:
1) The REQ line, that is request, which is transmitted by the master device when it requests information from the slave;
2) The ACK line, that is, acknowledge, which is instead transmitted by the slave when the requested information is placed on the data bus.
IV. packet switching==> A)breaks information down into pieces that can take different paths
Packet switching is a digital network communication method in which all data is transferred in blocks of appropriate size. The transferred data is divided into small pieces called a packet. The packages contain fields for user data, routing, error correction and flow control.Address information is needed for the network to deliver the packet. The package structure used by everyone is not the same as the package structure used depends on the hardware. The data is placed in small packets of 500 - 2000 bytes in the network. The stations convert long messages into packets. These packets are sent individually to the network. Packets sent are received at each switching point and sent to the next switching point after being buffered. Using decision-making algorithms, switching points can find the correct way to send the packet.There is no need to create a bus before the connection. In packet switching, packets do not use the same path to reach the destination.
V. ICANN==> C)Allocates IP addresses
The Internet Corporation for Assigned Names and Numbers(ICANN) is a nonprofit private sector organization that has been created with the broad participation of the Internet's business, technical, academic and user groups. ICANN's task is not to run the Internet, but to coordinate technical, administrative and policy development tasks that require central coordination. ICANN was officially appointed on 30 September 1998 to coordinate the technical management of the Internet domain names system, the allocation of IP address spaces, the setting of protocol parameters, and the administration of the Internet root server system. ICANN Support Organizations are member-based units with expertise.