Which of the following is true concerning ISL?
It is supported on both the 1900 and 2950 switches.
It adds a 26-byte trailer and 4-byte header.
Tagging is done in software.
The original Ethernet frame is not modified.
Correct Answer :
D. The original Ethernet frame is not modified.
Related Questions
Which type of traffic is sent to a group of devices?
Multicast
Unicast
Broadcast
Groupcast
If the port status LED on a 2950 is ________, there is a physical layer connection problem.
Flashing green and amber
Flashing green
Amber
Flashing amber
RIP supports load balancing for up to __________ ___________ paths.
Six, unequal-cost
Four, unequal-cost
Four, equal-cost
Six, equal-cost
Which router command would you use to view the configuration register value?
show register
show interfaces
show configuration
show version
A __________ route is the best path to reach a destination within the topology table.
Successor
Feasible successor
Advertised distance
Feasible distance
You are at User EXEC mode and type the letter e. What message appears?
% Incomplete command.
% Ambiguous command:
% Unknown command or computer name
% Invalid input detected at '^'.
172.16.240.256 is a class __________ address.
A
B
C
None of the above
What uses 64 Kbps of bandwidth?
PRI
BRI
DS1
DS0
___________ defines LAPD, which is responsible for the data-link layer connection between the router and the ISDN switch.
Q.931
Q.921
I.921
I.931
You are given a class C network, 192.168.1.0/24. You need three networks with 60 hosts and two networks with 30 hosts. What are the subnet mask values you could use?
255.255.255.128 and 255.255.255.192
255.255.255.224 and 255.255.255.240
255.255.255.192 and 255.255.255.224
None of these
Which of the following is false concerning OSPF?
It provides a loop-free topology.
It is a classful protocol and allows for a hierarchical design.
It requires more memory and processing cycles than distance vector protocols.
It is complex to configure and difficult to troubleshoot.
You examine your interfaces, and the Ethernet 0 interface status says: Ethernet 0 is up, line protocol is down. What does this indicate?
There is a physical layer problem.
There is a data link layer problem.
There is a network layer problem.
There is no problem.
EIGRP uses the _________ algorithm to update its routing table.
Bellman-Ford
Dijkstra
DUAL
Integrated
OSPF uses __________ as a metric.
Bandwidth
Delay
Cost
Hop count
Which interface type is used to connect to the serial interface of a router?
EIA/TIA-232
V.35
DB-60
X.21
The router automatically saves its configuration.
True
False
How would you suspend a telnet session?
CTRL-SHIFT-X 6
CTRL-SHIFT-6 X
CTRL-6 X
CTRL-C
The address of a Frame Relay VC is called a ___________.
Data link layer connection identifier
Data layer connection index
Data link connection index
Data link connection identifier
What router command saves the active configuration to NVRAM?
copy nvram startup-config
copy startup-config running-config
copy running-config nvram
copy running-config startup-config
You execute the line console 0 command from Configuration mode. What will the router's prompt be?
Router(config)#
Router(config-line)#
Router(config-interface)#
Router#(config-if)
__________ states that if a neighboring router sends a route to a router, the receiving router will not propagate this route back to the advertising router on the same interface.
Split horizon
Poison reverse
Hold-down timer
Hop count limit
Which of the following are not features of ACLs?
Restricting telnet access to a router
Prioritizing WAN traffic
Filtering traffic from the router
Triggering dialup phone calls
An idle DDR connection will be torn down after _________ seconds of not seeing interesting traffic.
120
122
130
132
You are given a Class C network with a subnet mask of 255.255.255.248. How many host addresses are there on each subnet?
4
6
8
14
Which command assigns a default gateway to the 2950 switch?
(config)# default-gateway
(config-if)# default-gateway
(config-if)# ip default-gateway
(config)# ip default-gateway
If the 2950's RPS is ________, the external power supply is supplying power.
Off
Amber
Flashing amber
Green
Which control sequence moves the cursor to the end of the line?
CTRL-A
ctrl-p
ctrl-e
ctrl-z
Which of the following is not true concerning TCP?
Provides for reliable connections
Uses windowing for flow control
Multiplexes applications
Is more efficient than UDP
Which router command specifies the ISDN switch the router is connected to?
isdn switch-type
isdn connection-type
isdn spid1
interface serial0:15
A VTP server switch generates a summary advertisement every _________ minutes.
1
2
3
5