Câu 1: Giải thích sự khác nhau giữa connectionless unacknowledged service và connectionless
acknowledged service.
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Connectionless unacknowledged service is a type of network service in which data packets
are sent without any guarantee of delivery. If a packet is lost, the sender will not be notified.
This type of sercie is often used for application where reliability if not as import as speed,
such as streaming media or online gaming.
Connectionless acknowledged service is a type of network service in which data packets are
sent with an acknowledgement from the receiver. This means that the sender knows if the
packet wass received correctly. If a packet is lost, the sender will resend it. This type of
service is often used for application where reliability is important, such as file transfer or
email.
The protocols that provide these services differ in the way they handle packet loss. In connectionless
unacknowledged service, the sender does not know if a packet was received correctly. If a packet i lost,
the sender will simply send it again. This can lead to duplicate packets being received by the receiver. In
connectionless acknowledged service, the sender knows if a packet was received correctly because the
receiver sends an acknowledgement. This means that the sender does not need to resend packets that
were lost.
Câu 2: Giải thích sự khác nhau giữa connection-oriented acknowledged service vaf connectionless
acknowledged service.
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+ Connection-oriented acknowledged service is a type of network service in which a connection
is established between the sender and receiver before any data is sent. This connection provides
a guarantee of delivery for all data packets. If a packet s lost, the sender will resend it until it is
received correctly. This type of service is often used for applications where reliability is critical,
such as file transfer or video conferencing.
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Connectionless acknowledged service is a type of network service in which data packets are sent
without establishing a connection between the sender and receiver. Each packet is
acknowledged individually, so if a packet is lost, the sender wil only know that the packet was
lost if the receiver does not send an acknowledgement. This type of service is often used for
applications where reliability is not as critical as speed, such as email or streaming media.
The protocols that provide these services differ in the way they handle packet loss. In connectionoriented acknowledged service, the sender knows if a packet was received correctly because the
receiver sends an acknowledgement. If a packet i lost, the sender will resend it until tis received
correctly. This ensures that all data packets are delivered reliably. In connectionless acknowledged
service, the sender does not know if a packet was received correctly unless the receiver sends an
acknowledgement. If a packet is lost, the sender will not know that the packet was lost unless the
receiver does not send an acknowledgement, This means that there is a small chance that some data
packets may be lost.