A packet sniffer can also be used on the internet to capture data traveling between computers. Internet packets often have very long distances to travel, passing through several routers that act like intermediate post offices. A packet sniffer might be installed at any point along the way. It could also be clandestinely installed on a server that acts as a gateway or collects vital personal information.
A packet sniffer is not just a hacker's tool. It can be used for network troubleshooting and other useful purposes. However, in the wrong hands, a packet sniffer can capture sensitive personal information that can lead to invasion of privacy, identity theft, and other serious eventualities.
Circuit switching.
Packet switching has two advantages: (1) If something goes wrong, only a small piece of data (the packet) has to be resent. (2) Packet switching allows multiplexing - several communications happening at once.Packet switching has two advantages: (1) If something goes wrong, only a small piece of data (the packet) has to be resent. (2) Packet switching allows multiplexing - several communications happening at once.Packet switching has two advantages: (1) If something goes wrong, only a small piece of data (the packet) has to be resent. (2) Packet switching allows multiplexing - several communications happening at once.Packet switching has two advantages: (1) If something goes wrong, only a small piece of data (the packet) has to be resent. (2) Packet switching allows multiplexing - several communications happening at once.
A PDU (Protocol Data Unit) is defined by which layer it is in. In the physical layer and network layer, it is synonymous with the packet, in the data link layer, it is the frame. In the transport layer, it is a datagram for UDP. A datagram holds one or more PDU's, as it is the basic unit of transferring information via packet switching.
IP Datagram
Datagram networks offer advantages such as simplicity and flexibility, allowing packets to be routed independently, which can lead to efficient use of network resources and lower latency. However, they also have disadvantages, including potential packet loss, out-of-order delivery, and the need for higher-level protocols to manage reliability and ordering, which can complicate application development. Additionally, the lack of a dedicated connection can result in variable performance and unpredictable delays.
A datagram or packet needs to be self-contained without reliance on earlier exchanges because there is no connection of fixed duration between the two communicating points as there is, for example, in most voice telephone conversations.
packet switching is use today
packet switching circuit switching message switching
Packet Switching =)
Packet Switching - Computer Communications (Digital)Circuit Switching was used for old fashioned telephony. At present, many companies use VOIP (Packet Switching) for voice communications.
Differentiated Services Field
In circuit switching there is also some required overhead; the overhead in packet switching is usually a small percentage of the total traffic; and in any case, the benefits of packet switching far outweigh any disadvantage of some minor overhead.