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}
50. By
giving the command "show ip
route igrp", we ca see the
routes found by igrp. A route
discovered by igrp is denoted by
letter "I" before start of the
entry.
51. 7 steps
in building a Prototype are:
- Review
the customer's requirement
-
Determine the extent of the
prototype
-
Understand your competition
-
Develop a test plan
-
Purchase and prepare
equipment
-
Practice
-
Conduct final tests and
demonstrations
52. Default
administrative distances are as
below:
- Route
Source
Default Distance
-
Directly connect Interface
0
- Static
Route
1
- EIGRP
Summary Route
5
-
Internal EIGRP
90
-
IGRP
100
-
OSPF
110
-
RIP
120
-
Unknown
255
The
administrative distance (metric)
is used to represent the
trustworthiness of the route.
Lower the value, higher the
trustworthiness. A value of 255
represents that the route is
unreachable.
53. Private
addresses are described in RFC
1918. There are one Class A
network, 16 Class B networks and
255 Class C networks that belong
to private address space. There
are:
Class Type
Start Address
Stop Address
Class A
10.0.0.0
10.255.255.255
Class B
172.16.0.0
172.31.255.255
Class C
192.168.0.0
192.168.255.255
The above
address range is reserved for
private use.
54. Cisco
IOS supports
-
Priority Queuing is useful
for time sensitive, mission
critical protocols such as
SNA.
- Custom
queuing handles the queues
in round robin fashion.
- Weight
Fair Queuing is enabled by
default and requires no
configuration.
