Senin, 02 Juli 2012
Selasa, 19 Juni 2012
Evaluasi CCNA Discovery 1 - Chapter 7
Q.1 Why is IEEE 802.11 wireless technology able to transmit
further distances than Bluetooth technology?
transmits at much lower frequencies
has higher power output
transmits at much higher frequencies
uses better encryption methods
Q.2 What are three advantages of wireless over wired technology? (Choose three.)
more secure
longer range
anytime, anywhere connectivity
easy and inexpensive to install
ease of using licensed air space
ease of adding additional devices
Q.3 What are two benefits of wireless networking over wired networking? (Choose two.)
speed
security
mobility
reduced installation time
allows users to share more resources
not susceptible to interference from other devices
Q.4 A technician has been asked to provide wireless connectivity to the wired Ethernet network of a building. Which three factors affect the number of access points needed? (Choose three.)
the size of the building
the number of solid interior walls in the building
the presence of microwave ovens in several offices
the encryption method used on the wireless network
the use of both Windows and Appletalk operating systems
the use of shortwave or infrared on the AP
Q.5 Why is security so important in wireless networks?
Wireless networks are typically slower than wired networks.
Televisions and other devices can interfere with wireless signals.
Wireless networks broadcast data over a medium that allows easy access.
Environmental factors such as thunderstorms can affect wireless networks.
Q.6 What does the Wi-Fi logo indicate about a wireless device?
IEEE has approved the device.
The device is interoperable with all other wireless standards.
The device is interoperable with other devices of the same standard that also display the Wi-Fi logo.
The device is backwards compatible with all previous wireless standards.
Q.7 Which statement is true concerning wireless bridges?
connects two networks with a wireless link
stationary device that connects to a wireless LAN
allows wireless clients to connect to a wired network
increases the strength of a wireless signal
Q.8 Which WLAN component is commonly referred to as an STA?
cell
antenna
access point
wireless bridge
wireless client
Q.9 Which statement is true concerning an ad-hoc wireless network?
created by connecting wireless clients in a peer-to-peer network
created by connecting wireless clients to a single, centralized AP
created by connecting multiple wireless basic service sets through a distribution system
created by connecting wireless clients to a wired network using an ISR
Q.10 Refer to the graphic. In the Wireless menu option of a Linksys integrated router, what does the Network Mode option Mixed mean?
The router supports encryption and authentication.
The router supports both wired and wireless connections.
The router supports 802.11b, 802.11g, and 802.11n devices.
The router supports connectivity through infrared and radio frequencies.
Q.11 Refer to the graphic. In the Wireless menu of a Linksys integrated router, what configuration option allows the presence of the access point to be known to nearby clients?
Network Mode
Network Name (SSID)
Radio Band
Wide Channel
Standard Channel
SSID Broadcast
Q.12 Which two statements about a service set identifier (SSID) are true? (Choose two.)
tells a wireless device to which WLAN it belongs
consists of a 32-character string and is not case sensitive
responsible for determining the signal strength
all wireless devices on the same WLAN must have the same SSID
used to encrypt data sent across the wireless network
Q.13 Which two statements characterize wireless network security? (Choose two.)
Wireless networks offer the same security features as wired networks.
Wardriving enhances security of wireless networks.
With SSID broadcast disabled, an attacker must know the SSID to connect.
Using the default IP address on an access point makes hacking easier.
An attacker needs physical access to at least one network device to launch an attack.
Q.14 What type of authentication does an access point use by default?
Open
PSK
WEP
EAP
Q.15 Which statement is true about open authentication when it is enabled on an access point?
requires no authentication
uses a 64-bit encryption algorithm
requires the use of an authentication server
requires a mutually agreed upon password
Q.16 What are two authentication methods that an access point could use? (Choose two.)
WEP
WPA
EAP
ASCII
pre-shared keys
Q.17 What is the difference between using open authentication and pre-shared keys?
Open authentication requires a password. Pre-shared keys do not require a password.
Open authentication is used with wireless networks. Pre-shared keys are used with wired networks.
Pre-shared keys require an encrypted secret word. Open authentication does not require a secret word.
Pre-shared keys require a MAC address programmed into the access point. Open authentication does not require this programming.
Q.18 What term describes the encoding of wireless data to prevent intercepted data from being read by a hacker?
address filtering
authentication
broadcasting
encryption
passphrase encoding
Q.19 What access-point feature allows a network administrator to define what type of data can enter the wireless network?
encryption
hacking block
traffic filtering
MAC address filtering
authentication
Q.20 What are the two WEP key lengths? (Choose two.)
8 bit
16 bit
32 bit
64 bit
128 bit
Q.21 Complete the following sentence: WEP is used to ______ , and EAP is used to _____ wireless networks.
encrypt; authenticate users on
filter traffic; select the operating frequency for
identify the wireless network; compress data on
create the smallest wireless network; limit the number of users on
transmits at much lower frequencies
has higher power output
transmits at much higher frequencies
uses better encryption methods
Q.2 What are three advantages of wireless over wired technology? (Choose three.)
more secure
longer range
anytime, anywhere connectivity
easy and inexpensive to install
ease of using licensed air space
ease of adding additional devices
Q.3 What are two benefits of wireless networking over wired networking? (Choose two.)
speed
security
mobility
reduced installation time
allows users to share more resources
not susceptible to interference from other devices
Q.4 A technician has been asked to provide wireless connectivity to the wired Ethernet network of a building. Which three factors affect the number of access points needed? (Choose three.)
the size of the building
the number of solid interior walls in the building
the presence of microwave ovens in several offices
the encryption method used on the wireless network
the use of both Windows and Appletalk operating systems
the use of shortwave or infrared on the AP
Q.5 Why is security so important in wireless networks?
Wireless networks are typically slower than wired networks.
Televisions and other devices can interfere with wireless signals.
Wireless networks broadcast data over a medium that allows easy access.
Environmental factors such as thunderstorms can affect wireless networks.
Q.6 What does the Wi-Fi logo indicate about a wireless device?
IEEE has approved the device.
The device is interoperable with all other wireless standards.
The device is interoperable with other devices of the same standard that also display the Wi-Fi logo.
The device is backwards compatible with all previous wireless standards.
Q.7 Which statement is true concerning wireless bridges?
connects two networks with a wireless link
stationary device that connects to a wireless LAN
allows wireless clients to connect to a wired network
increases the strength of a wireless signal
Q.8 Which WLAN component is commonly referred to as an STA?
cell
antenna
access point
wireless bridge
wireless client
Q.9 Which statement is true concerning an ad-hoc wireless network?
created by connecting wireless clients in a peer-to-peer network
created by connecting wireless clients to a single, centralized AP
created by connecting multiple wireless basic service sets through a distribution system
created by connecting wireless clients to a wired network using an ISR
Q.10 Refer to the graphic. In the Wireless menu option of a Linksys integrated router, what does the Network Mode option Mixed mean?
The router supports encryption and authentication.
The router supports both wired and wireless connections.
The router supports 802.11b, 802.11g, and 802.11n devices.
The router supports connectivity through infrared and radio frequencies.
Q.11 Refer to the graphic. In the Wireless menu of a Linksys integrated router, what configuration option allows the presence of the access point to be known to nearby clients?
Network Mode
Network Name (SSID)
Radio Band
Wide Channel
Standard Channel
SSID Broadcast
Q.12 Which two statements about a service set identifier (SSID) are true? (Choose two.)
tells a wireless device to which WLAN it belongs
consists of a 32-character string and is not case sensitive
responsible for determining the signal strength
all wireless devices on the same WLAN must have the same SSID
used to encrypt data sent across the wireless network
Q.13 Which two statements characterize wireless network security? (Choose two.)
Wireless networks offer the same security features as wired networks.
Wardriving enhances security of wireless networks.
With SSID broadcast disabled, an attacker must know the SSID to connect.
Using the default IP address on an access point makes hacking easier.
An attacker needs physical access to at least one network device to launch an attack.
Q.14 What type of authentication does an access point use by default?
Open
PSK
WEP
EAP
Q.15 Which statement is true about open authentication when it is enabled on an access point?
requires no authentication
uses a 64-bit encryption algorithm
requires the use of an authentication server
requires a mutually agreed upon password
Q.16 What are two authentication methods that an access point could use? (Choose two.)
WEP
WPA
EAP
ASCII
pre-shared keys
Q.17 What is the difference between using open authentication and pre-shared keys?
Open authentication requires a password. Pre-shared keys do not require a password.
Open authentication is used with wireless networks. Pre-shared keys are used with wired networks.
Pre-shared keys require an encrypted secret word. Open authentication does not require a secret word.
Pre-shared keys require a MAC address programmed into the access point. Open authentication does not require this programming.
Q.18 What term describes the encoding of wireless data to prevent intercepted data from being read by a hacker?
address filtering
authentication
broadcasting
encryption
passphrase encoding
Q.19 What access-point feature allows a network administrator to define what type of data can enter the wireless network?
encryption
hacking block
traffic filtering
MAC address filtering
authentication
Q.20 What are the two WEP key lengths? (Choose two.)
8 bit
16 bit
32 bit
64 bit
128 bit
Q.21 Complete the following sentence: WEP is used to ______ , and EAP is used to _____ wireless networks.
encrypt; authenticate users on
filter traffic; select the operating frequency for
identify the wireless network; compress data on
create the smallest wireless network; limit the number of users on
Senin, 04 Juni 2012
Tabel Subnet Mask Untuk Kelas A, B, C
Kelas A 11111111.00000000.00000000.00000000 255.0.0.0
Kelas B 11111111.11111111.00000000.00000000 255.255.0.0
Kelas C 11111111.11111111.11111111.00000000 255.255.255.0
Tabel subnetting Kelas A :
CIDR Subnet Mask Host Network
Tabel subnetting Kelas A :
CIDR Subnet Mask Host Network
/8 255.0.0.0 16777212 1
/9 255.128.0.0 8388606 2
/10 255.192.0.0 4194302 4
/11 255.224.0.0 2097150 8
/12 255.240.0.0 1048574 16
/13 255.248.0.0 524286 32
/14 255.252.0.0 262142 64
/15 255.254.0.0 131070 128
Tabel subneting Kelas B :
CIDR Subnet Host Network
/16 255.255.0.0 65534 1
/17 255.255.128.0 32766 2
/18 255.255.192.0 16382 4
/19 255.255.224.0 8190 8
/20 255.255.240.0 4094 16
/21 255.255.248.0 2046 32
/22 255.255.252.0 1022 64
/23 255.255.254.0 510 128
Tabel subneting Kelas C :
CIDR Subnet Host Network
/24 255.255.255.0 254 1
/25 255.255.255.128 126 2
/26 255.255.255.192 62 4
/27 255.255.255.224 30 8
/28 255.255.255.240 14 16
/29 255.255.255.248 6 32
/30 255.255.255.252 2 64
/31 255.255.255.254 0 128
/9 255.128.0.0 8388606 2
/10 255.192.0.0 4194302 4
/11 255.224.0.0 2097150 8
/12 255.240.0.0 1048574 16
/13 255.248.0.0 524286 32
/14 255.252.0.0 262142 64
/15 255.254.0.0 131070 128
Tabel subneting Kelas B :
CIDR Subnet Host Network
/16 255.255.0.0 65534 1
/17 255.255.128.0 32766 2
/18 255.255.192.0 16382 4
/19 255.255.224.0 8190 8
/20 255.255.240.0 4094 16
/21 255.255.248.0 2046 32
/22 255.255.252.0 1022 64
/23 255.255.254.0 510 128
Tabel subneting Kelas C :
CIDR Subnet Host Network
/24 255.255.255.0 254 1
/25 255.255.255.128 126 2
/26 255.255.255.192 62 4
/27 255.255.255.224 30 8
/28 255.255.255.240 14 16
/29 255.255.255.248 6 32
/30 255.255.255.252 2 64
/31 255.255.255.254 0 128
Selasa, 29 Mei 2012
Evaluasi CCNA Discovery 1 - Chapter 4
CCNA Discovery 1 - Chapter 4
Chapter 4 - Connecting to the Internet Through an ISP
1. Which definition describes the
term Internet?
a group of PCs connected together
on a LAN
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a group of PCs connected together
by an ISP
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a network of networks that
connects countries around the world
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a worldwide collection of networks
controlled by a single organization
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2. What type of connection point is
a point of presence (POP)?
between a client and a host
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between two local networks
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between a computer and a switch
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between an ISP and a home-based
LAN
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3. What is the term for the group of
high-speed data links that interconnect ISPs?
Internet LAN
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ISP backbone
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Internet gateways
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Internet providers
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Internet backbone
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4. Which device can act as a router,
switch, and wireless access point in one package?
hub
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bridge
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modem
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repeater
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ISR
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5. What are three characteristics of
business class ISP service? (Choose three.)
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6. What is a major characteristic of
asymmetric Internet service?
Download speeds and upload speeds
are equal.
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Download speeds are slower than
upload speeds.
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Upload speeds and download speeds
are different.
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Upload speeds and download speeds
are irrelevant.
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7. Which three elements are required
to successfully connect to the Internet? (Choose three.)
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8. What term describes each router
through which a packet travels when moving between source and destination
networks?
NOC
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ISP
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hop
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segment
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9. What does the tracert
command test?
NIC functionality
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the ISP bandwidth
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the network path to a destination
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the destination application
functionality
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10. What type of end-user
connectivity requires that an ISP have a DSLAM device in their network?
analog technology
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cable modem technology
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digital subscriber line technology
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wireless technology
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11. Why would an ISP require a CMTS
device on their network?
to connect end users using cable
technology
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to connect end users using analog
technology
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to connect end users using
wireless technology
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to connect end users using digital
subscriber line technology
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12.
Refer to the graphic. What type of
cabling is shown?
STP
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UTP
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coax
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fiber
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13.
Refer to the graphic. What type of
cabling is shown?
STP
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UTP
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coax
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fiber
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14. Which two places are most
appropriate to use UTP cabling? (Choose two.)
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15. What does adherence to cabling
standards ensure?
data security
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no loss of signal
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no electromagnetic interference
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reliable data communications
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16.
Refer to the graphic. What type of
cable is shown?
crossover
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eight coax channels
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multimode fiber
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single-mode fiber
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straight-through
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17. What connector is used to
terminate Ethernet unshielded twisted pair (UTP) cabling?
ST
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BNC
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RJ-11
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RJ-45
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18. Which two characteristics
describe copper patch panels? (Choose two.)
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19. What are two advantages of cable
management? (Choose two.)
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20. What are two common causes of
signal degradation when using UTP cabling? (Choose two.)
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21. What are three commonly followed
standards for constructing and installing cabling? (Choose three.)
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