- A window (in
computer networks) is:
- Window =
a consecutive sequence
of integer values
used as
sequence numbers for
frames
Examples: 2 windows
- W1 = 0, 1, 2, 3, 4, 5
- W2 = 3, 4, 5, 6
- Window size =
the number of
integers in the window
Examples:
- Size of W1 = 6
- Size of W2 = 4
- Window =
a consecutive sequence
of integer values
used as
sequence numbers for
frames
- Send/Sender window:
- Send Window =
the list of
sequence numbers
that the sender can
use to
label (= identify)
an
outstanding frames
Example:
- Send Window =
the list of
sequence numbers
that the sender can
use to
label (= identify)
an
outstanding frames
- Receive/Receiver window:
- Receive Window =
the list of
sequence numbers
that the receiver will
consider (= accept) as
new (data) frames
Example:
- Receive Window =
the list of
sequence numbers
that the receiver will
consider (= accept) as
new (data) frames
- Important facts:
- Sender window and
receiver window can
be different in
size (= width)
- The best setting is
send window size = receive window size
- But this setting is not required !!!
- The best setting is
send window size = receive window size
- Sender window and
receiver window are
(must)
lined up at the
start of the
communication session
Lined up means:
- first value in sender window = first value in receiver window
Example:
- Sender window and
receiver window can
be different in
size (= width)