Q36
You are the network administrator at CertKing . The ISP has assigned the network 192.166.69.0/24 for
use on the CertKing network.
Which of the following addresses can assign to hosts? (Choose all that apply.)A. 192.166.69.0B. 192.166.70.1C. 192.166.69.24D. 192.166.69.154E. 192.166.69.254F. 192.166.69.255Ans: C, D, E
In this cidr address, 192.166.69.0 is the network address. The /24 indicates that the subnet mask is a 24 bit
mask. This equates to 11111111.11111111.11111111.00000000 in binary, or 255.255.255.0.
We can calculate the number of hosts on the network by using the 2n-2 formula where n = number of hosts bits
(i.e. bits not used for the subnet mask). In this case n = 8. 28-2=254. Thus network 192.166.69.0 supports 254
hosts but remember that 192.166.69.0 is the network address so the 254 hosts will be 192.166.69.1-254.
Incorrect Anss:
A: 192.166.69.0 is the network address. The network address and the broadcast address cannot be assigned to
hosts.
B: 192.166.70.1 is on network 192.166.70.0.
F: 192.166.69.255 is the broadcast address. The network address and the broadcast address cannot be assigned
to hosts.
Reference:
CertKing 640-821 Study Guide, Section 2, "IP Addressing and Subnetting"


Q37
You are the network administrator at CertKing . CertKing has been assigned the Class B IP address
139.66.0.0 by its Internet Service Provider. Your newly appointed CertKing trainee wants to know how
many hosts will be supported on each subnet if you divide the network by using the 255.255.255.248
subnet mask.
What would your reply be?A. 6B. 8C. 14D. 16E. 24F. 30Ans: A
The subnet mask 255.255.255.248 is a 29 bit mask (11111111.11111111.11111111.11111000). It uses 5 bits
from the host id for the network ID, leaving 3 bits for host addresses. We can calculate the number of hosts
supported by this subnet by using the 2n-2 formula where n represents the number of host bits. In this case it
will be 5. 23-2 gives us 6.
Reference:
CertKing 640-821 Study Guide, Section 2, "IP Addressing and Subnetting"


Q38
You are a technician at CertKing . Your newly appointed CertKing trainee wants to know what address a
router uses to make a routing decision when it sends an IP packet out to an Ethernet interface to a
remote host.
What would your reply be?A. A Hexadecimal addressB. The IP address of the destination host.C. The MAC address of the interface.D. The MAC address of the source host.Ans: B

Explanation:
Ethernet networks use IP addresses.


Q39
The initial boot system commands on a Cisco router are stored in a startup configuration file in NVRAM.
If NVRAM this file is not in NVRAM, where does the router look for the Cisco IOS?A. In ROMB. In RAMC. In Flash memoryD. In BootstrapAns: C

Explanation:
Flash memory - Either an EEPROM or a PCMCIA card, Flash memory stores fully functional IOS images and
is the default location where the router gets its IOS at boot time. Flash memory also can be used to store any
other files, including configuration files.
Reference:
CCNA Self-Study CCNA INTRO exam certification Guide (Cisco Press, ISBN 1-58720-094-5) page 187


Q40
With regard to Ethernet media access methods, which of the following are true? (Choose all that apply.)A. A device waits for an electronic signal before transmitting.B. A device listens and waits until the media is not busy before transmitting.C. All devices on an Ethernet segment see data that passes on the network medium.D. Only the sender and the receiver devices see data that passes on the network medium.E. Ethernet networks allow you to configured devises with higher transmission priority.Ans: B, C


Q41
Where does a router store the current configuration file while in operation?A. In ROMB. In RAMC. On a TFTP serverD. IN NVRAME. In flash memoryAns: B

Explanation:
IOS on a router uses a configuration file for the initial configuration at router startup and the active, running
configuration file. The startup configuration file is in NVRAM; the other file, which is in RAM, is the one that
the router uses during operation. When the router first comes up, the router copies the stored configuration file
from MVRAM into RAM, so the running and startup configuration files are identical at that point.
Reference:
CCNA Self-Study CCNA INTRO exam certification Guide (Cisco Press, ISBN 1-58720-094-5) Page 188