On a local subnet with the 255.255.255.224 subnet mask, what is the maximum number of IP addresses that can be issued to hosts? 16 O 24 O 32 C, 34 64 128
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- Suppose you have created six subnets on a network that leases a group of Class C IPv4 addresses. What subnet mask must you specify in your clients’ configurations to adhere to your subnetting scheme?a. 255.255.255.6b. 255.255.255.128c. 255.255.255.192d. 255.255.255.224e. 255.255.255.0In a class C network, using a mask of 255.255.255.252 will provide a total of 64 subnets T/F??TrueFalse In class C subnet, the block size of 64 is obtained with a mask /27*a. Trueb. False The Block size for 192.168.1.0/25 is 128*a. Trueb. FalseIn a class A subnet, we know the IP address of one of the hosts and the subnet mask as given below: IP Address: 25.34.12.56 Subnet mask: 255.255.0.0 What is the first address (subnet address)? What is the last address?
- Netmask (or subnet mask) is a 32-bit mask to identify the network/host portion of the IPv4 address. It is a sequence of left contiguous/consecutive ones (1) followed by a block of zeros (0). Which netmask below is valid netmasks? (choose three) a. 255.255.255.192 b. 255.252.0.0 c. 255.255.255.0 d. 252.255.0.0 e. 255.128.255.0You have been allocated a class C network address of 211.1.1.0 and are using the default subnet mask of 255.255.255.0 how may hosts can you have?In order to implement a DNS amplification attack, the attacker must trigger the creation of a sufficiently large volume of DNS response packets from the intermediary to exceed the capacity of the link to the target organization. Consider an attack where the DNS response packets are 500 bytes in size (ignoring framing overhead). a. How many of these packets per second must the attacker trigger to flood a target organization using a 30-Mbps link? A 100-Mbps link? Or a 1-Gbps link? b. If the DNS request packet to the intermediary is 60 bytes in size, how much bandwidth does the attacker consume to send the necessary rate of DNS request packets for each of these three cases?
- Which subnet mask is an example of classless subnetting? I am confused. a. 255.0.0.0 b. 255.255.240.0 c. 255.255.0.0 d. 255.255.255.0Consider a class C network with the subnet mask 255.255.255.41. How many network and host id (HID) are there in the subnet mask? (A) 24.3 (B) 24,5 (C) 20.6 (D) 20, 8write the following iptables on the server to block the following traffic types originated from the attacker to the server: HTTP connection request from the attacker to the server. SSH connection request from the attacker to the server. FTP and Telnet requests ( Use single rule to block these multiple ports).
- Suppose a user has a webserver running at a machine with the name nadir.edu.net.pk and IP address 10.10.10.10. The authoritative DNS address for this web server is with the name dns.nadir.edu.net.pk and with IP address 11.11.11.11. Write all the steps involved in retrieving the IP address of nadir.edu.net.pkWhat is the purpose of an IP address mask? Suppose an IP address is identified as 200.60.40.88/24. What is the network address in this case? What is the host address? How many hosts can this network address support? Repeat this exercise for the IP address 222.66.44.80/26.Given the IP address 180.15.128.0/20. Now, using the given IP address space create five subnets in such a way so that less number of IP address is wasted for each subnet and the subnets will have the following number of hosts SubnetA - 23 hostsSubnetB - 50 hostsSubnetC - 2 hostsSubnetD - 6 hostsSubnetE - 10 hostsNow find out the following for each subnet: a) Network ID b) Broadcast address c) First usable IP address d) Last usable IP address e) Subnet mask Here, while solving the question make sure you are saving IP addresses. For example, SubnetA needs 23 hosts so in SubnetA you can allocate maximum 30 hosts. Follow the table for all the allowed number of hosts and required number of host bits for each subnet: Name of Subnet Maximum number hosts you can allocate Length of Host bits in the IP address cannot exceed SubnetA 30 5-bits SubnetB 62 6-bits SubnetC 2 2-bits SubnetD 6…