Answers to the Chapter 4 Q&A Section 723
31
How many IP addresses must be configured for network management on a Cisco Catalyst
1900 switch if eight ports are to be used and with three VLANs?
A single IP address is needed. No need exists for an IP address per port because the switch
is not a router. The management IP address is considered to be in VLAN1.
32
What command on a 1900 series switch would cause the switch to block frames destined
to 0200.7777.7777, entering interface 0/5, from going out port 0/6?
The mac-address-table restricted static 0200.7777.7777 0/6 0/5 global configuration
command would block the frames. This also makes address 0200.7777.7777 permanently
held in the MAC address table for port 0/6.
33
What Catalyst 1900 switch command displays the version of IOS running in the switch?
This is a trick question. The show version command shows the level of switch software,
but because the switch does not run IOS, no command will display the level of IOS in the
switch.
34
What does the Catalyst 1900 switch command address violation disable do?
This global configuration command tells the switch what action to take when the
maximum number of addresses on a port has been exceeded. If a new dynamically learned
MAC address on some port had caused the maximum (as defined by the port secure
command) to be exceeded, the port would have been disabled.
35
What command erases the startup config in a Catalyst 1900 switch?
The delete nvram EXEC command erases the configuration file in NVRAM. In fact,
although it is easy to call it the startup-config, commands instead refer to this
configuration file as NVRAM.
36
Configuration is added to the running configuration in RAM when commands are typed in
Catalyst 1900 configuration mode. What causes these commands to be saved into
NVRAM?
Unlike the router IOS, commands are saved in both running config and in NVRAM as the
user enters the configuration commands. No separate command, such as copy running-
config startup-config in the router IOS, is needed.
37
How do EXEC and configuration commands refer to the two Fast Ethernet ports on a
Catalyst 1912 switch?
These two ports are known as fastethernet 0/26 and 0/27. 0/25 is always reserved for the
AUI port, and 0/1 through 0/24 are always reserved for the (up to) first 24 Ethernet ports.
38
What Catalyst 1900 switch command displays the switching table?
The show mac-address-table command displays the table the switch uses to make
switching decisions.
apA.fm Page 723 Monday, March 20, 2000 5:24 PM