Which of the following is a valid subnet mask value?
255.0.255.255
0.0.0.255
255.255.254.0
255.255.255.256
Correct Answer :
C. 255.255.254.0
Related Questions
Which of the following is a Network layer protocol for the TCP/IP protocol stack?
TCP
UDP
ICMP
None of these
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
Private addressing is defined in RFC ______.
1920
1934
1818
1918
The TCP/IP protocol stack has ________ layers.
4
5
6
7
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
Distance vector protocols use ___________ to disseminate routing information.
Unicast
Multicast
Broadcast
Which type of traffic is sent to a group of devices?
Multicast
Unicast
Broadcast
Groupcast
If the 1900 SYSTEM LED is _________, a system POST test has failed.
Green
Amber
Flashing amber
Flashing green and amber
OSPF hellos are sent every __________ seconds on a multi-access medium.
5
10
15
40
Extended traceroute works from which mode?
User EXEC
Privilege EXEC
Configuration
User and Privilege EXEC
You are in Interface Subconfiguration mode and want to completely return to Privilege EXEC mode. What would you enter? (Choose all correct answers.)
CTRL-Z
end
exit
logout
___________ 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
Which router-on-a-stick command defines the VLAN for the interface?
vlan
encapsulation
trunk
frame-type
Ethernet ___________ has/have both a physical and logical bus topology.
10BaseT
10Base2 and 10Base5
10BaseT and 10Base2
10BaseT, 10Base2, and 10Base5
PPP can do all of the following except ___________.
Authentication
Compression
Quality of Service
None of these
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
A _________ connects two or more LANs in the same geographic area.
LAN
WAN
MAN
SAN
What command activates the IP routing process?
router
enable
network
no shutdown
You are given a MAC address of 01A2.0482.FE12. What is the OUI value in binary?
00011011.10100010.00000100
00000000.00000001.00000100
00000001.10100010.00000100
00000001.10100001.00000010
Which router command would you use to view the configuration register value?
show register
show interfaces
show configuration
show version
What would you enter to see the last few commands you entered?
show version
show commands
show previous
show history
Which protocol supports VLSM?
RIPv2
IGRP
RIP and IGRP
None of these
What command assigns a User EXEC password to a 2950 switch?
password
login
enable password
enable password level
Which router command creates a standard named ACL called test?
ip access-list test
access-list test
ip access-list standard test
access-list standard test
You are given this address space: 172.16.5.0/25. You need one network with 64 hosts and two with 30 hosts. What are the most specific subnet mask values to use?
/25 and /26
/26 and /27
/27 and /28
None of these
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
_________ defines how the Frame Relay DTE and DCE interact with each other.
DLCI
CIR
LMI
PMI
Which of the following commands belongs on the physical interface when using dialer profiles?
dialer pool-member
dialer-group
ip address
dialer string
_________ describe(s) users that can connect to a network from any location.
SOHO
Branch office
Mobile users
Corporate office
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.