48. Data
Link Switching (DLSw) was
introduced by IBM to overcome
the limitations of SRB
networks. The Cisco
implementation of DLSw is called
DLSw+. Benefits of DLSW+ are
over SRB are:
- Link
layer acknowledgements and
keep-alive messages of SNA
do not have to travel over
WAN link,
- DLSw+
traffic can be rerouted in
case of link failures
-
Prioritization of traffic
over WAN links
49.
The permitted numbers for some
important access-lists are:
-
1-99: IP standard access
list
-
100-199 :IP extended
access list
-
600-699: AppleTalk Access
list
-
800-899 : IPX standard
access list
-
900-999 : IPX extended
access list
-
1000-1099: IPX SAP access
list
-
1100-1199: Extended
48-bit MAC address access list
The format
for standard IPX access list is:
access-list
{number} {permit/ deny} {source}
{destination}
