In a DHCP Server, which Scopes is used to provide IPV4 address pools for Class A, B, and C networks, and has an IP address range assignment that includes the subnet mask, as well as exclusions and reservations? * Normal Perceptions Scopes for Multicast Scopes of Failover Greetings, Super Scopes
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In a DHCP Server, which Scopes is used to provide IPV4 address pools for Class A, B, and C networks, and has an IP address range assignment that includes the subnet mask, as well as exclusions and reservations? * Normal Perceptions Scopes for Multicast Scopes of Failover Greetings, Super Scopes
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- In IEEE 802.11, two-way communication is used to authenticate an open system. In order to authenticate the client, the server must give the station ID (typically the MAC address). Response to the client's previous request is either a successful or failed authentication response from the access point/router. An error may arise if, for example, an AP/router configuration does not include the client's MAC address.In what ways is it advantageous to use this kind of authentication scheme?In what ways does this authentication technique have security vulnerabilities that might be mitigated?A socket is one endpoint of a two-way communication link between two programs running on the network. A socket is bound to a port number so that the TCP layer can identify the application that data is destined to be sent to. An endpoint is a combination of an IP address and a port number.Discuss about the different types of socket calls using in TCP &UDP.Detailed assessment involves scanning all 65,536 TCP and SCTP ports for each IP address withinscope, along with testing of common UDP ports (to save time). I have yet to find a UDP servicerunning on a nonstandard port during testing, and so running a UDP scan with Nmap’s default serviceslist is sufficient
- Three-way handshake is used by a TCP client and a TCP server to establish a connection, as illustrated below: 1st: client:port1 -> server:port2, SYN 2nd: server:port2 -> client:port1, SYNACK 3rd: client:port1 -> server:port2, ACK When this client is performing scanning attacks, it will generated a large number of failed connections. In each failed connection, the three-way handshake fails to complete. People commonly use SYN together with the absence of its corresponding SYNACK in this same TCP session to identify whether this connection is failed. By investigating the failed connections, an engineer finds that in legitimate/benign cases, if the server does not return SYNACK to the client, the client will not send the ACK packet after SYNACK (e.g., the 3rd packet above). Therefore, this engineer suggests that we can count the failed connections based on the following rules without considering SYNACK:Determine whether or not the following IPv6 address notations are correct:•::0F53:6382:AB00:67DB:BB27:7332•7803:42F2:::88EC:D4BA:B75D:11CD•::4BA8:95CC::DB97:4EAB•74DC::02BA•::00FF:128.112.92.116Three-way handshake is used by a TCP client and a TCP server to establish a connection, as illustrated below: 1st: client:port1 -> server:port2, SYN 2nd: server:port2 -> client:port1, SYNACK 3rd: client:port1 -> server:port2, ACK When this client is performing scanning attacks, it will generated a large number of failed connections. In each failed connection, the three-way handshake fails to complete. People commonly use SYN together with the absence of its corresponding SYNACK in this same TCP session to identify whether this connection is failed. By investigating the failed connections, an engineer finds that in legitimate/benign cases, if the server does not return SYNACK to the client, the client will not send the ACK packet after SYNACK (e.g., the 3rd packet above). Therefore, this engineer suggests that we can count the failed connections based on the following rules without considering SYNACK: If a client:port1 sends…
- An ISP allocates the 3000:FACE:6/48 block of IPV6 addresses to an enterprise. The entrprise assigns a the subnet id = 2B with an interface id = 2. Using the 3+1+4 address rule, what is the most compressed IPV6 representation of the address? 3000:FACE:6:2:2B/64 3000:FACE:6:0:2:2B/64 3000:FACE:6:2000::2B/64 3000:FACE:6:2:2B/64Refer to the network figure above, showing two Ethernet Subnets connected through an IP Router, answer the following question 1-5. The devices in each subnet are connected locally to each other through layer two intermediate devices such as Ethernet switch and ethernet hub. For each device in the subnets, both its Internet Protocol (IP )address and its MAC address (also called the Physical address or the Ethernet address are shown. The subnet mask used by all devices is 255.255.255.240 (which is the same as the prefix length “/28”). 1. If Client #1 wants to send a broadcast packet to all the devices on the left subnet (containing client #1, client #2, client #3) what destination IP address should be used? (Mention in both binary and decimal format.) 2. What is the first and last assignable IP address for the left subnet above (containing client #1 and #3)? (Mention in both binary and decimal format.)Q' Figure below shows the IPV4 datagram format. Fill the fields from 1 to 5 by choosing the right answers 2 16-bit identifier ID flags 3 4 32 bit source IP address 5 options Data (variable length, typically a TCP or UDP segment) 1- Field (1) is for: a- Time to live b- IP protocol version number c- Type of service d- Header checksum e- Upper layer protocol f- None of them 2- Field (2) is for: a- Time to live b- IP protocol version number c- Type of service d- Header checksum e- Upper layer protocol f- None of above 3- Field (3) is for: a- Time to live b- IP protocol version number c- Type of service d- Header checksum e- 32 bit destination IP address f- None of them
- An IP address can be written as a 32-bit number. For a class B network, the two most significant bits are set to 10. The 16 most significant bits are used as a network ID, and the 16 least significant bits are used as a host ID. However, the host ID cannot be all 0's or all 1's. How many hosts (i.e., host IDs) can there be on a class B network?The IPV4 Header Header And Its Fields Are Given For Your Reference. Read the questions that follow the Header diagram. IPV4 Header Byte Offset IHL (Header Length) Version Type of Service (TOS) Total Length IP Flags x D M 4 Identification Fragment Offset 20 Time To Live (TTL) Protocol Header Checksum Bytes II I I I IHL (Internet Header Length) 12 Source Address 16 Destination Address 20 IP Option (variable length, optional, not common) Bit To 1 2 3 4 5 6 78 9 0 1 2 3 4 56 7 89 Nibble FByte Word 2 314 5 6 7 8 9 0 Version IP Flags Protocol Fragment Offset Version of IP Protocol. 4 and 6 are valid. This diagram represents version 4 structure only. IP Protocol ID. Including (but not limited to): 1 ICMP 17 UDP 2 IGMP 47 GRE 88 EIGRP 6 TCP 9 IGRP 51 AH Fragment offset from start of IP datagram. Measured in 8 byte (2 words, 64 bits) increments. If IP datagram is fragmented, fragment size (Total Length) must be a multiple of 8 bytes. x DM 57 SKIP x Ox80 reserved (evil bit) D Ox40 Do Not…. In IPv4 static route, the next hop can be identified by an IP address, exit interface, or both. Write the three route types in specifying the destination and explain one only.