Specifications

Common Configuration
59
S
S
T
T
P
P
S
S
E
E
T
T
U
U
P
P
(
(
O
O
N
N
L
L
Y
Y
A
A
V
V
A
A
I
I
L
L
A
A
B
B
L
L
E
E
I
I
N
N
A
A
C
C
C
C
E
E
S
S
S
S
P
P
O
O
I
I
N
N
T
T
,
,
P
P
O
O
I
I
N
N
T
T
T
T
O
O
P
P
O
O
I
I
N
N
T
T
A
A
N
N
D
D
P
P
O
O
I
I
N
N
T
T
T
T
O
O
M
M
U
U
L
L
T
T
I
I
P
P
L
L
E
E
P
P
O
O
I
I
N
N
T
T
M
M
O
O
D
D
E
E
S
S
)
)
Spanning Tree Protocol (STP) is a link management protocol that helps to
prevent undesirable loops occurs in the network. For an Ethernet network to
function properly, only one active path can exist between two stations. If a
loop exists in the network topology, duplication of messages will occur and this
might confuse the forwarding algorithm and allow duplicate frames to be
forwarded.