ccent test

[mjcheal]

Chào mọi người em đang làm mấy bài tập ko biết đúng hay sai mong mọi ngừời coi dùm em đúng hay sai,hay có chỗ nào góp ý dùm em.

QUESTION 1
Which of the following devices can an administrator use to segment their LAN?
(Choose three)
A. Hubs
B. Repeaters
C. Switches
D. Bridges
E. Routers
F. Media Converters
G. All of the above

QUESTION 2
Within the VNPRO office, The Sales and Production networks are separated by a
router as shown in the diagram below:

Which of the following statements most accurately describes the characteristics of
the above networks broadcast and collision domains? (Choose two)
A. There are two broadcast domains in the network.
B. There are four broadcast domains in the network.
C. There are six broadcast domains in the network.
D. There are four collision domains in the network.
E. There are five collision domains in the network.
F. There are seven collision domains in the network.

QUESTION 3

Which two of the addresses below are available for host addresses on the subnet
192.168.15.19/28? (Choose two)
A. 192.168.15.17
B. 192.168.15.14
C. 192.168.15.29
D. 192.168.15.16
E. 192.168.15.31
F. None of the above

QUESTION 4
Three addresses are shown in binary form below:
A. 01100100.00001010.11101011.00100111
B. 10101100.00010010.10011110.00001111
C. 11000000.10100111.10110010.01000101

Regarding these three binary addresses in the above exhibit; which statements below
are correct? (Select three)
A. Address C is a public Class C address.
B. Address C is a private Class C address.
C. Address B is a public Class B address.
D. Address A is a public Class A address.
E. Address B is a private Class B address.
F. Address A is a private Class A address.

QUESTION 5
The VNPRO network consists of 5 different departments as shown below:

You are a systems administrator at VNPRO and you've just acquired a new Class C IP
network. Which of one of the subnet masks below is capable of providing one useful
subnet for each of the above departments while still allowing enough usable host
addresses to meet the needs of each department?
A. 255.255.255.128
B. 255.255.255.192
C. 255.255.255.224
D. 255.255.255.240
E. 255.255.255.248
F. 255.255.255.252

[hell13]

Câu 1: yêu cầu chọn 3, nên câu trả lời là C,D, và E.
Câu 5: C do yêu cầu cao nhất là 16 users; it́ nhất là 2^5 - 2 = 30---> dùng 5 host bits để subnet (nếu 4 host bits thì ko đủ cho 2 addresses broadcast và network). Vậy còn lại 3 bits cho netmask (8-5 = 3). ---->mask /27 ----> 128+64+32=224---> mask 255.255.255.224

Check lại, với 3 bits network thì đủ chia 8 subnets (2^3 = 8)---> đạt yêu cầu số phòng ban đã cho (5).

[mjcheal]

Câu 1: yêu cầu chọn 3, nên câu trả lời là C,D, và E.
Câu 5: C do yêu cầu cao nhất là 16 users; it́ nhất là 2^5 - 2 = 30---> dùng 5 host bits để subnet (nếu 4 host bits thì ko đủ cho 2 addresses broadcast và network). Vậy còn lại 3 bits cho netmask (8-5 = 3). ---->mask /27 ----> 128+64+32=224---> mask 255.255.255.224

Check lại, với 3 bits network thì đủ chia 8 subnets (2^3 = 8)---> đạt yêu cầu số phòng ban đã cho (5).

cảm ơn bác hell13 nhiều

[mjcheal]

lại phải làm phiền mọi người nữa rồi

QUESTION 6
Using a subnet mask of 255.255.255.224, which of the IP addresses below can you
assign to the hosts on this subnet? (Choose three)
A. 16.23.118.63
B. 87.45.16.159
C. 92.11.178.93
D. 134.178.18.56
E. 192.168.16.87
F. 217.168.166.192


QUESTION 7
Which of the following IP addresses is a private IP address? (Choose two)
A. 12.0.0.1
B. 168.172.19.39
C. 172.20.14.36
D. 172.33.194.30
E. 192.168.42.34

QUESTION 8
Your ISP has assigned you the following IP address and subnet mask:
IP address: 199.141.27.0
Subnet mask: 255.255.255.240
Which of the following addresses can be allocated to hosts on the resulting subnet?
(Choose three)
A. 199.141.27.2
B. 199.141.27.175
C. 199.141.27.13
D. 199.141.27.11
E. 199.141.27.208
F. 199.141.27.112


QUESTION 9
The network 172.25.0.0 has been divided into eight equal subnets. Which of the following IP addresses can be assigned to hosts in the third subnet if the ip subnet-
zero command is configured on the router? (Choose three)
A. 172.25.78.243
B. 172.25.98.16
C. 172.25.72.0
D. 172.25.94.255
E. 172.25.96.17
F. 172.25.100.16


QUESTION 10
After the router interfaces shown in the diagram have been configured, it is
discovered that hosts in the Branch LAN cannot access the Internet.
Further testing reveals additional connectivity issues.



What will fix this problem?
A. Change the address of the Branch router LAN interface.
B. Change the address of the Branch router WAN interface.
C. Change the subnet mask of the HQ router LAN interface.
D. Change the address of the HQ router LAN interface.
E. Change the address of the HQ router interface to the Internet.
F. Change the subnet mask of the HQ router interface to the Internet.

[vodanh112]

câu 7: 172.20.14.36 vs 192.168.42.34 (2 IP private)
câu 8: A-C-D vì SM là /28 ---> có 2^4-2= 14 host chạy từ 199.141.27.1-199.141.27.14 (bỏ 0 vs 15 do trùng địa chỉ net vs broadcast)
câu 10:B do IP trên cổng serial của HQ vs Branch là khác subnet

[mjcheal]

câu 7: 172.20.14.36 vs 192.168.42.34 (2 IP private)
câu 8: A-C-D vì SM là /28 ---> có 2^4-2= 14 host chạy từ 199.141.27.1-199.141.27.14 (bỏ 0 vs 15 do trùng địa chỉ net vs broadcast)
câu 10:B do IP trên cổng serial của HQ vs Branch là khác subnet

thank anh vô danh nhiều

[mjcheal]

lại phải tiếp tục nhờ mọi người chỉ giáo tiếp đây

QUESTION 11

Refer to the exhibit. Host A is communicating with host B. How will the data be
addressed when it leaves host A?


A. Source MAC=000A.8A47.E612
Destination MAC=000B.DC04.12F4
Source IP=192.168.23.4
Destination IP=192.168.23.1
B. Source MAC=000A.8A47.E612
Destination MAC=0010.7BE7.FAEF
Source IP=192.168.23.4
Destination IP=192.168.127.7
C. Source MAC=000A.8A47.E612
Destination MAC=000B.DC04.12F4
Source IP=192.168.23.4
Destination IP=192.168.127.7
D. Source MAC=000A.8A47.E612
Destination MAC=0010.7BE7.FAEF
Source IP=192.168.23.4
Destination IP=192.168.23.1

QUESTION 12

How does replacing a hub with a switch affect CSMA/CD behavior in an Ethernet
network?
A. It effectively eliminates collisions.
B. In increases the size of the collision domain by allowing more devices to be connected at
once.
C. It decreases the amount of time that a jam signal must be sent to reach all network
devices.
D. It reduces the total amount of bandwidth available to each device.
E. It eliminates Layer 3 broadcast traffic.

QUESTION 13
Which of the following are benefits of segmenting a network with a router? (Choose
two)
A. Broadcasts are not forwarded across the router.
B. All broadcasts are completely eliminated.
C. Adding a router to the network decreases latency.
D. Filtering can occur based on Layer 3 information.
E. Routers are more efficient than switches and will process the data more quickly.
F. None of the above.

QUESTION 14
You are a technician at VNPRO. Your newly appointed VNPRO trainee wants to know
what the CDP is. What would your reply be? (Choose three)
A. It is globally enabled by default on Cisco routers.
B. It is globally enabled by default on all routers.
C. It is a proprietary protocol.
D. It is a non-proprietary protocol.
E. It can be used to gather hardware and protocol information about neighbor devices.

QUESTION 15
In the Cisco IOS, what is the definition of a global command?
A. A command that can be entered in any configuration mode.
B. A command that supports all protocols.
C. A command that is implemented in all IOS versions.
D. A command that is set once and affects the entire router.
E. A command that is available in every release of IOS.

[mjcheal]

mấy câu hỏi này khó quá.ai biết thì chỉ dùm nha
cảm ơn nhiều

[quang.tien00]

câu 12: How does replacing a hub with a switch affect CSMA/CD behavior in an Ethernet
network?
đáp án: CSMA/CD là cơ chế giải quyết xung đột (collisions
A. It effectively eliminates collisions.

câu 13:
đáp án A và D

[hell13]

Tài lanh cái xem nào: :)

câu 11: B; frame thì dùng destination MAC của gateway; source MAC and IP add chính nó. Destination IP của máy cần liên lạc.
câu 14: ACD. CDP: Cisco Discovery Protocol. Khi học mạng, chịu khó tìm hiểu và nhớ mấy chữ viết tắt th̀i dễ nắm khái niệ́m.
câu 15: D, cái này thuộc định nghĩa, sau này bạn làm labs nhiều nhiều thì nhớ. Hôì mới làm quen mạng tui cũng hay lẫn lộn: global mode (#), interface mode (config-if)# ...

[mjcheal]

cảm ơn mấy bác nhiều