Bài Tập Subnet đây !!!!!!!!!!!!

[haylamnguoi]

giải mình bài này với.Cám ơn
1. Assume that 4 bits have been borrowed. Identify the subnet addresses (choose 3)
A.B.C.D/x
X =2n where n is host bit
a) 192.168.14.8
b) 192.168.14.16
c) 192.168.14.24
d) 192.168.14.32
e) 192.168.14.148
f) 192.168.14.208

2. Assuming a subnet mask of 255.255.224.0, which of the following would be a valid host address? (choose 3)

a) 124.78.103.0
b) 125.67.32.0
c) 125.78.160.0
d) 126.78.48.0
e) 176.55.96.0
f) 186.211.100.0

3. Which of the following are private IP addresses? ( choose 3)

a) 172.168.33.1
b) 10.35.66.70
c) 192.168.99.5
d) 172.18.88.90
e) 192.169.77.89
f) 127.33.55.16

4. The router reads each bit to determine the class of an address. Which of the following binary numbers would the router identify as a public class A address? (choose 3)

a) 00001010.10101100.11001100.00000111
b) 00011111.11110011.11111111.00111011
c) 01011101.11100001.11001100.11011011
d) 10000000.11111000.11000111.11110011
e) 00010111.11011011.11000001.11001100



5. What is the maximum number of subnets that can be assigned to networks when using the address 172.16.0.0 with a subnet mask of 255.255.240. ?
a) 16
b) 32
c) 30
d) 14
e) This is an invalid subnet mask for the Network

6. Which network mask should you place on a class C address to accommodate a user requirement of two sub networks with a maximum of 35 hosts on each network?
a) 255.255.255.192
b) 255.255.255.224
c) 255.255.255.240
d) 255.255.255.248

7. How many valid host IP addresses are available on the following network/subnetwork? 198.197.196.16/30
a) 2
b) 30
c) 254
d) 16,382
e) 65,534

8. Given an IP address of 172.16.2.160 and a subnet mask of 255.255.255.192, to which subnet does the host belong?
a) 172.16.2.32
b) 172.16.2.64
c) 172.16.2.96
d) 172.16.2.128
e) 172.16.2.192

9. Given the following IP address from the class B address range:
172.35.21.12

Your network plan requires no more than 126 hosts on a subnet that includes this address. When you configure the IP address in Cisco IOS software, which value should you use as the subnet mask?

a) 255.255.0.0
b) 255.255.128.0
c) 255.255.255.128
d) 255.255.255.252



10. You are given an IP Address 132.15.136.2/18 what subnet is the host IP on ?
a) A 132.15.136.0
b) B 132.15.128.0
c) C 132.15.192.0
d) D 132.15.64.0

11. In order to have 5 subnets and 17 hosts on each subnet, how many bits of subnetting will you use on the class B address 162.13.0.0/16 ?
a) 255.255.128.0
b) 255.255.224.0
c) 255.255.240.0
d) 255.255.248.0

[luancb]

2. Assuming a subnet mask of 255.255.224.0, which of the following would be a valid host address? (choose 3)

a) 124.78.103.0
b) 125.67.32.0
c) 125.78.160.0
d) 126.78.48.0
e) 176.55.96.0
f) 186.211.100.0

3. Which of the following are private IP addresses? ( choose 3)

a) 172.168.33.1
b) 10.35.66.70
c) 192.168.99.5
d) 172.18.88.90
e) 192.169.77.89
f) 127.33.55.16

[luancb]

5. What is the maximum number of subnets that can be assigned to networks when using the address 172.16.0.0 with a subnet mask of 255.255.240. ?
a) 16
b) 32
c) 30
d) 14
e) This is an invalid subnet mask for the Network

7. How many valid host IP addresses are available on the following network/subnetwork? 198.197.196.16/30
a) 2
b) 30
c) 254
d) 16,382
e) 65,534

[luancb]

9. Given the following IP address from the class B address range:
172.35.21.12

Your network plan requires no more than 126 hosts on a subnet that includes this address. When you configure the IP address in Cisco IOS software, which value should you use as the subnet mask?

a) 255.255.0.0
b) 255.255.128.0
c) 255.255.255.128
d) 255.255.255.252

10. You are given an IP Address 132.15.136.2/18 what subnet is the host IP on ?
a) A 132.15.136.0
b) B 132.15.128.0
c) C 132.15.192.0
d) D 132.15.64.0

[beloanbupbe]

cho mình hỏi

cho minh hỏi 7. How many valid host IP addresses are available on the following network/subnetwork? 198.197.196.16/3
a) 2
b) 30
c) 254
d) 16,382
e) 65,534

[bquocky]

Địa chỉ IP gồm 32 bit, nếu mượn 30 bit làm phần network (do /30) thì chúng ta còn lại 2 bit làm địa chỉ gán cho host.

Với 2 bit, chúng ta sẽ có 2^2 (hai mũ hai) giá trị có thể có, tức sẽ có 4 giá trị.

Trong đó có 2 địa chỉ không sử dụng:
- Địa chỉ mạng: là địa chỉ mà tất cả các bit phần host đều bật lên 0, trong trường hợp này, địa chỉ mạng là 198.197.196.16 (198.197.196.0001 0000) với 2 bit host cuối bằng 0.
- Địa chỉ broadcast: là địa chỉ mà tất cả các bit phần host đều bật lên 1, trong trường hợp này, địa chỉ broadcast là 198.197.196.19 (198.197.196.0001 0011) với 2 bit host cuối bằng 1.