| Q1➡ | GATE 2020 An organization requires a range of IP addresses to assign one to each of its 1500 computers. The organization has approached an Internet Service Provider (ISP) for this task. The ISP uses CIDR and serves the requests from the available IP address space 202.61.0.0/17. The ISP wants to assign an address space to the organization which will minimize the number of routing entries in the ISP’s router using route aggregation. Which of the following address spaces are potential candidates from which the ISP can allot any one to the organization? I. 202.61.84.0/21 II. 202.61.104.0/21 III. 202.61.64.0/21 IV. 202.61.144.0/21 |
| i ➥ I and II only |
| ii ➥ III and IV only |
| iii ➥ II and III only |
| iv ➥ I and IV only |
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| Q2➡ | GATE 2019 Consider three machines M, N and P with IP addresses 100.10.5.2, 100.10.5.5, and 100.10.5.6 respectively. The subnet mask is set to 255.255.255.252 for all the three machines. Which one of the following is true? |
| i ➥ M, N, and P all belong to the same subnet |
| ii ➥ Only M and N belong to the same subnet |
| iii ➥ M, N and P belong to three different subnets |
| iv ➥ Only N and P belong to the same subnet |
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| Q3➡ | GATE 2010 Suppose computers A and B have IP addresses 10.105.1.113 and 10.105.1.91 respectively and they both use the same net mask N. Which of the values of N given below should not be used if A and B should belong to the same network? |
| i ➥ 255.255.255.0 |
| ii ➥ 255.255.255.128 |
| iii ➥ 255.255.255.192 |
| iv ➥ 255.255.255.224 |
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| Q4➡ | GATE 2008 The host X has IP address 192.168.1.97 and is connected through two routers R1 and R2 to another host Y with IP address 192.168.1.80. Router R1 has IP addresses 192.168.1.135 and 192.168.1.110. R2 has IP addresses 192.168.1.67 and 192.168.1.155. The netmask used in the network is 255.255.255.224. Given the information above, how many distinct subnets are guaranteed to already exist in the network? |
| i ➥ 1 |
| ii ➥ 2 |
| iii ➥ 3 |
| iv ➥ 6 |
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| Q5➡ | GATE 2008 If a class B network on the Internet has a subnet mask of 255.255.248.0, what is the maximum number of hosts per subnet? |
| i ➥ 1012 |
| ii ➥ 1023 |
| iii ➥ 2046 |
| iv ➥ 2047 |
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| Q6➡ | GATE 2007 The address of a class B host is to be split into subnets with a 6-bit subnet number. What is the maximum number of subnets and the maximum number of hosts in each subnet? |
| i ➥ 62 subnets and 262142 hosts. |
| ii ➥ 64 subnets and 262142 hosts. |
| iii ➥ 62 subnets and 1022 hosts. |
| iv ➥ 64 subnets and 1024 hosts. |
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| Q7➡ | A subnetted Class B network has the following broadcast address: 144.16.95.255. Its subnet mask |
| i ➥ is necessarily 255.255.224.0 |
| ii ➥ is necessarily 255.255.240.0 |
| iii ➥ is necessarily 255.255.248.0 |
| iv ➥ could be any one of 255.255.224.0, 255.255.240.0, 255.255.248.0 |
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| Q8➡ | GATE 2006 router uses the following routing table:  A packet bearing a destination address 144.16.68.117 arrives at the router. On which interface will it be forwarded? |
| i ➥ Ethernet-2 |
| ii ➥ Ethernet-3 |
| iii ➥ Ethernet-0 |
| iv ➥ Ethernet-1 |
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| Q9➡ | GATE 2006 Two computers C1 and C2 are configured as follows. C1 has IP address 203.197.2.53 and netmask 255.255.128.0. C2 has IP address 203.197.75.201 and netmask 255.255.192.0. Which one of the following statements is true? |
| i ➥ C1 and C2 both assume they are on the same network |
| ii ➥ C2 assumes C1 is on same network, but C1 assumes C2 is on a different network |
| iii ➥ C1 assumes C2 is on same network, but C2 assumes C1 is on a different network |
| iv ➥ C1 and C2 both assume they are on different networks |
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| Q10➡ | GATE 2005 CIL An organization has a class B network and wishes to form subnets for 64 departments. The subnet mask would be: |
| i ➥ 255.255.0.0 |
| ii ➥ 255.255.64.0 |
| iii ➥ 255.255.128.0 |
| iv ➥ 255.255.252.0 |
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| Q11➡ | GATE 2003 The subnet mask for a particular network is 255.255.31.0. Which of the following pairs of IP addresses could belong to this network? |
| i ➥ 172.57.88.62 and 172.56.87.233 |
| ii ➥ 10.35.28.2 and 10.35.29.4 |
| iii ➥ 191.203.31.87 and 191.234.31.88 |
| iv ➥ 128.8.129.43 and 128.8.161.55 |
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| Q12➡ | NTA UGC NET June 2019 What percentage(%) of the IPv4, IP address space do all class C addresses consume? |
| i ➥ 12.5% |
| ii ➥ 25% |
| iii ➥ 37.5% |
| iv ➥ 50% |
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| Q13➡ | NTA UGC NET June 2019 What is the name of the protocol that allows a client to send a broadcast message with its MAC address and receive an IP address in reply? |
| i ➥ ARP |
| ii ➥ DNS |
| iii ➥ RARP |
| iv ➥ ICMP |
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| Q14➡ | NTA UGC NET June 2019 Consider the following two statements with respect to IPv4 in computer networking: P: The loopback(IP) address is a member of class B network Q: The loopback(IP) address is used to send a packet from host to itself What can you say about the statements P and Q? |
| i ➥ P-True: Q-False |
| ii ➥ P-False; Q-True |
| iii ➥ P-True; Q-True |
| iv ➥ P-False; Q-false |
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| Q15➡ | NTA UGC NET June 2019 You need 500 subnets, each with about 100 usable host addresses per subnet. What network mass will you assign using a class B network address? |
| i ➥ 255.255.255.252 |
| ii ➥ 255.255.255.128 |
| iii ➥ 255.255.255.0 |
| iv ➥ 255.255.254.0 |
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| Q16➡ | NTA UGC NET DEC 2019 Which of the following class of IP address has the last address as 223.255.255.255? |
| i ➥ Class A |
| ii ➥ Class B |
| iii ➥ Class C |
| iv ➥ Class D |
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| Q17➡ | GATE 2012 NTA UGC NET December 2018 An internet service provider (ISP) has following chunk of CIDR-based IP addresses available with it: 245.248.128.0/20 . The ISP want to give half of this chunk of addresses to organization A and a quarter to Organization B while retaining the remaining with itself. Which of the following is a valid allocation of addresses to A and B? |
| i ➥ 245.248.132.0/22 and 245.248.132.0/21 |
| ii ➥ 245.248.136.0/21 and 245.248.128.0/22 |
| iii ➥ 245.248.136.0/24 and 245.248.132.0/21 |
| iv ➥ 245.248.128.0/21 and 245.248.128.0/22 |
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| Q18➡ | NTA UGC NET December 2018 The four byte IP Address consists of |
| i ➥ Neither network nor Host Address |
| ii ➥ Network Address |
| iii ➥ Both Network and Host Address |
| iv ➥ Host Address |
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| Q19➡ | NET Dec 2014 In a classful addressing, first four bits in Class-A IP address is |
| i ➥ 1010 |
| ii ➥ 1100 |
| iii ➥ 1011 |
| iv ➥ None of these |
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| Q20➡ | NET 2014 Which of the following is used in the options field of IPv4 ? |
| i ➥ Strict source routing |
| ii ➥ Loose source routing |
| iii ➥ Time stamp |
| iv ➥ All of the above |
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| Q21➡ | A network on the Internet has a subnet mask of 255.255.240.0. What is the maximum number of hosts it can handle ? |
| i ➥ 1024 |
| ii ➥ 2048 |
| iii ➥ 4096 |
| iv ➥ None of the above |
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| Q22➡ | In classful addressing, a large part of the available addresses are ______. |
| i ➥ Dispersed |
| ii ➥ Blocked |
| iii ➥ Wasted |
| iv ➥ Reserved |
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| Q23➡ | IP addresses are generally written in the dotted-decimal notation. Given the IP address in binary is 1000000010000 1 1 10100010000000101 Using dotted decimal notation it is written as |
| i ➥ 100.000001.00001.100 |
| ii ➥ 80.87.66.05 |
| iii ➥ 135.128.68.5 |
| iv ➥ 128.135.68.5 |
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| Q24➡ | If a host has an IP address 201.40.67.31/25, what are the network ID and broadcast address of the network to which this host belongs: |
| i ➥ 201.40.67.31, 201.40.67.63 |
| ii ➥ 201.40.67.0, 201.40.67.255 |
| iii ➥ 201.40.67.0, 201.40.67.63 |
| iv ➥ None of the above |
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| Q25➡ | Two systems S1 and S2 are configured with the following IP address: S1: 203.197.2.53; netmask 255.255.128.0 S2: 203.197.75.201; netmask 255.255.192.0 Which one of the following statements is true? |
| i ➥ S1 assumes S2 is on same network, but S2 assumes S1 is on a different network |
| ii ➥ S2 assumes S1 is on same network, but S1 assumes S2 is on a different network |
| iii ➥ S1 and S2 both assume they are on the same network |
| iv ➥ S1 and S2 both assume they are on different networks |
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| Q26➡ | How many host interfaces may be addressed in the subnet 123.224.00.00/11? |
| i ➥ 2,097,150 |
| ii ➥ 1,000,192 |
| iii ➥ 2048 |
| iv ➥ 2,097,152 |
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| Q27➡ | __________ is used to obtain the IP address of a host based on its physical address. |
| i ➥ RARP |
| ii ➥ IPV6 |
| iii ➥ TFTP |
| iv ➥ TELNET |
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| Q28➡ | If an IP address starts with a bit sequence of 11110, it is a class _______ address. |
| i ➥ B |
| ii ➥ C |
| iii ➥ D |
| iv ➥ E |
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| Q29➡ | In IPV4, using the classful addressing scheme, the whole address space is divided into how many classes: |
| i ➥ 16 |
| ii ➥ 5 |
| iii ➥ 8 |
| iv ➥ 24 |
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| Q30➡ | In which kind of communication, the destination address in each packet is the same for all duplicate? |
| i ➥ Unicasting |
| ii ➥ Multiple unicasting |
| iii ➥ Broad casting |
| iv ➥ Multicasting |
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| Q31➡ | Which of the following are not valid IPV4 addresses? |
| i ➥ 192.10.14.3 |
| ii ➥ 10.34.110.77 |
| iii ➥ 200.172.287.33 |
| iv ➥ 65.92.11.00 |
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| Q32➡ | IP address range for E class network is |
| i ➥ 1.0.0.0 to 127.0.0.0 |
| ii ➥ 128.0.0.0 to 191.255.0.0 |
| iii ➥ 224.0.0.0 to 139.255.255.0 |
| iv ➥ 240.0.0.0 to 255.255.255.255 |
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| Q33➡ | ISRO 2020 Which of the following classes of languages can validate an IPv4 address in dotted decimal format? It is to be ensured that the decimal values lie between 0 and 255. |
| i ➥ RE and higher |
| ii ➥ CFG and higher |
| iii ➥ CSG and higher |
| iv ➥ Recursively enumerable language |
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| Q34➡ | Which network protocol allows hosts to dynamically get a unique IP number on each bootup |
| i ➥ DHCP |
| ii ➥ BOOTP |
| iii ➥ RARP |
| iv ➥ ARP |
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| Q35➡ | The subnet mask for a particular network is 255.255.31.0. Which of the following pairs of IP addresses could belong to this network? |
| i ➥ 172.57.88.62 and 172.56.87.23 |
| ii ➥ 10.35.28.2 and 10.35.29.4 |
| iii ➥ 191.203.31.87 and 191.234.31.88 |
| iv ➥ 128.8.129.43 and 128.8.161.55 |
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| Q36➡ | The DNS maps the IP address to |
| i ➥ A binary address as strings |
| ii ➥ An alphanumeric address |
| iii ➥ A hierarchy of domain names |
| iv ➥ A hexadecimal address |
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| Q37➡ | In a class B subnet, we know the IP address of one host and the mask as given below: IP address: 125.134.112.66 Mask: 255.255.224.0 What is the first address(Network address)? |
| i ➥ 125.134.96.0 |
| ii ➥ 125.134.112.0 |
| iii ➥ 125.134.112.66 |
| iv ➥ 125.134.0.0 |
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| Q38➡ | ISRO CS 2014 The process of modifying IP address information in IP packet headers while in transit across a traffic routing device is called |
| i ➥ Port address translation (PAT) |
| ii ➥ Network address translation (NAT) |
| iii ➥ Address mapping |
| iv ➥ Port mapping |
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| Q39➡ | An organization is granted the block 130.34.12.64/26. It needs to have 4 subnets. Which of the following is not an address of this organization? |
| i ➥ 130.34.12.124 |
| ii ➥ 130.34.12.89 |
| iii ➥ 130.34.12.70 |
| iv ➥ 130.34.12.132 |
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| Q40➡ | A supernet has a first address of 205.16.32.0 and a supernet mask of 255.255.248.0. A router receives 4 packets with the following destination addresses. Which packet belongs to this supernet? |
| i ➥ 205.16.42.56 |
| ii ➥ 205.17.32.76 |
| iii ➥ 205.16.31.10 |
| iv ➥ 205.16.39.44 |
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| Q41➡ | What is IP class and number of sub-networks if the subnet mask is 255.224.0.0? |
| i ➥ Class A, 3 |
| ii ➥ Class A, 8 |
| iii ➥ Class B, 3 |
| iv ➥ Class B,32 |
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| Q42➡ | CIL 2020 Consider the classful addressing, the IP address 128.252.144.84 denotes: |
| i ➥ 0.0.0.0 as network ID and 128.252.252.84 as node ID |
| ii ➥ 128.0.0.0 as network ID and 128.252.127.84 as node ID |
| iii ➥ 128.252.144.0 as network ID and 128.252.144.84 as node ID |
| iv ➥ 128.252.0.0 as network ID and 128.252.144.84 as node ID |
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| Q43➡ | An organization has a Class B network and wishes to form subnets for 60 departments. The subnet mask would be: |
| i ➥ 255.255.64.0 |
| ii ➥ 255.255.0.0 |
| iii ➥ 255.255.252.0 |
| iv ➥ 255.255.255.0 |
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| Q44➡ | CIL 2014 A block of addresses is granted to a small organization, If one of the addresses is 210.32.64.79/26, then what will be the values of the following? (i) First address (ii) Last address (iii) Total number of addresses |
| i ➥ (i) 210.32.64.64, (ii) 210.32.64.127, (iii)64 |
| ii ➥ (i) 210.32.64.64, (ii) 210.32.64.255, (iii)32 |
| iii ➥ (i) 210.32.64.79, (ii) 210.32.64.255, (iii)64 |
| iv ➥ (i) 210.32.64.64, (ii) 210.32.64.79, (iii)128 |
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| Q45➡ | GATE 2012 In the IPv-4 addressing format, the number of networks allowed under Class C addresses is |
| i ➥ 214 |
| ii ➥ 221 |
| iii ➥ 27 |
| iv ➥ 224 |
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| Q46➡ | Which protocol will be used to automate the IP configuration mechanism which includes IP address, subnet mask, default gateway, and DNS information? |
| i ➥ SMTP |
| ii ➥ DHCP |
| iii ➥ ARP |
| iv ➥ TCP/IP |
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