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- which of the following files are used by TCP wrappers? ( Choose two.) a) /etc/wrap.allow b) /etc/wrap.deny c) /etc/hosts.allow d) /etc/hosts.denyQ10/ write True or False answer for the following statements. Correct the false statements 1. DHCP allow host to statically obtain its IP address from network server when it joins network. 2. IPV6 addresses are 32 bits, while IPV4 addresses are 128 bits. 3. IPsec is standard for IP network security, available for both IPV4 and IPV6. 4. IPSec helps to create authenticated and confidential packets for the transport layer 5. ICMP does not attempt to make IP a reliable protocol. it simply attempts to report errors and provide feedback on specific condition.UDP PROGRAM The client sends a message “HI” to the server Once the server received the full message, sever responds with “Hello, What’s your name?” When the client receives the full message from the server, Client should be able to enter the name via the terminal and send the name to the server. When the server received the full message, server responds with “Hello 'name', Welcome To The Server”. “name” should be the one that is received form the client.
- TCP connection-Server and Client connection using C. Please adjust the given code as needed. Do not change to another language. Please provide screenshots of it's execution. 1.- client read a line of characters(data) from its keyboard and sends the data to the server. 2- the server receives the data and converts characters to uppercase. 3- the server sends the modified data to the client. 4- the client receives the modified data and displays the line on its screen. //Server.c #include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <arpa/inet.h> #include <sys/socket.h> // Add header files if needed void error_handling(char *message); int main(int argc, char *argv[]) { int serv_sock; int clnt_sock; struct sockaddr_in serv_addr; struct sockaddr_in clnt_addr; socklen_t clnt_addr_size; // Declarer variables char message[]="Hello Socket Programming!"; if(argc!=2){ printf("Usage : %s <port>\n", argv[0]);…Look at the Snort Rule shown below: alert tcp any any -> any 80 (msg:"LOCAL PHP error redirect"; content:"login.php?error="; sid:1000100; rev:1;) Which packets from the list given below would the above Snort rule trigger as intrusions? There are multiple answers, and select all that answers the question. O 64.312.1.2:4236 -> 204.126.133.9:80 POST /php2-1-10/login.php? error=http://15.2.4.6 O 64.312.1.2:4317 -> 204.126.133.22:80 GET /phpadmin/setup.php O 64.312.1.2:1437 -> 204.126.133.7:80 GET /phpadmin/setup.php? error=http://15.2.4.6 O 64.312.1.2:4315 -> 204.126.133.22:80 GET /phpadmin/login.php? error=http://15.2.4.6 O 64.312.1.2:4237 -> 204.126.133.19:80 GET /admin/errors/login.phpLook at the Snort Rule shown below: alert tcp any any -> any 80 (msg:"LOCAL PHP error redirect"; content:"login.php?error="; sid:1000100; rev:1;) In which Snort rules' file the above rule can be found (or is stored)? It can be found in:
- The connection oriented datagram socket uses UDP. True FalseActive sockets: Use the command netstat /? to explore the parameters that can be used with it. Then use netstat –n -a to display all current sockets (all connections and listening port). Choose one of the established connections and supply the following information: The server side normally has well-known port number, below 1024. What is the established protocol or service for the server port number you found above? (Search in Google for “port number list” or “well-known port numbers”)DISCOVER the purpose of Header fields used in TCP /IP: i. Sequence Numberii. Fragment offsetiii. Urgent Pointeriv. Header Checkv. Option + Padding
- 2- Client is connecting a server via TCP to get an object from HTTP Server. Skitch the TCPwindow connection including (establishing connection, the request from client, the response byserver, sending data from server side and closing the connection).Knowing that:1- Get request from the HTTP 1.1 server is 259 bytes.2- Response from the server is 223 bytes.3- Data size requested is 900 bytes.When you use your phone, if DNS looking up happens once every 10 minutes, and each time the HTTP file references 8 objects, how much time elapses with Non-persistent HTTP, and no parallel TCP connectionsLinux Command Function ifconfig also: ifcfg, ifup, ifdown, ethtool, nm-tool /etc/init.d/networking restart ip link set down ip link set up The ifconfig command is a tool used to display and configure network interfaces. This command will display information about the network card, IP address, broadcast address, and network mask. It also shows how many packets were received and transmitted. There is also information about the loopback device (lo). ping The ping command allows the user to test whether or not a network connection is active, the speed of that connection, and how a network behaves given specific data loads. arpalso: arping The arp command by itself is used to view the information currently in the ARP table (Address Resolution Protocol). This table maps the IP address of machines on your network segment with their MAC address. hostnamealso: domainname, dnsdomainname The hostname command tells you what the hostname of your machine is set to. The…