Is this statement true or false? Let's say for the sake of simplicity that a TCP connection's most recent SampleRTT is one second. The connection must be kept open if the current TimeoutInterval value is larger than one second.

There are two perspectives to consider. It is assumed that the most recent SampleRTT on a TCP connection is 1 second. To keep the current connection open, TimeoutInterval has to be larger than or equal to one second.

199

While developing a reliable transport protocol, early versions of the protocol discussed in class used a NAK message, sent by the receiver to the sender to indicate a packet was not correctly received. This kind of message, however, is not found in further protocols, like GBN, SR or even TCP. Why not? In other words, why don't these protocols provide a way to signal to the sender that the received message was received with an error

Is it the case or not? Let's pretend the most recent SampleRTT on your TCP connection was 1 second. The connection will time out if the TimeoutInterval is less than one second.

Is this an accurate or wrong statement? For simplicity, let us assume that the most recent SampleRTT on a TCP connection is one second. The current TimeoutInterval value for the connection must be greater than one second in order to maintain the connection.

Is this statement true or false? Let's say for the sake of simplicity that a TCP connection's most recent SampleRTT is one second. The connection must be kept open if the current TimeoutInterval value is larger than one second.

Can you confirm or deny that this is the case? Assume that the most recent SampleRTT on a TCP connection is 1 second. It's not possible to have a connection with a TimeoutInterval less than one second.

There are two ways to look at it. Assume that the most recent SampleRTT on a TCP connection is 1 second. TimeoutInterval must be greater than or equal to one second for the current connection.

Give a simple heuristic for finding two paths through a network from a given source to a given destination that can survive the loss of any communication line (assuming two such paths exist). The routers are considered reliable enough, so it is not necessary to worry about the possibility of router crashes.