what type of log file is shown in this figure? -SYSTEM -FIREWALL -APPLICATION -WEB SERVER
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what type of log file is shown in this figure?
-SYSTEM
-FIREWALL
-APPLICATION
-WEB SERVER
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- Explain,............ VLSM tables for these following IP addresses:1) 10.45.0.0/16 - Need 15, 77, 172, 224, 510 hosts2) 172.16.10.0/16 - Need 28, 60, 99 hosts3) 10.98.0.0/16 - Need 22, 81, 114, 375 hosts4) 10.10.0.0/16 - Need 31, 44, 68, 125, 425 hostsAlice, Bob and Mallory are all on a local network. Mallory is an off-path attacker with a super-fast connection: her packets always arrive first. Assume Mallory knows the MAC and IP addresses of Alice and Bob's computers. Assume that Alice will accept the first valid packet she receives as coming from Bob, and ignore what happens once Bob's real packet arrives. Alice and Bob are communicating through UDP on some unknown ports. What does Mallory need to guess to insert a fake UDP datagram from Bob to Alice? Alice and Bob are communicating through TCP on some unknown ports. What does Mallory need to guess to insert a fake TCP packet from Bob to Alice? Alice is about to send a DNS request to Bob's resolver for 1.2.3.4.5.6.7.com. What does Mallory need to guess to spoof the reply? ( Alice is about to send an ARP request for Bob's MAC address. What does Mallory need to guess to spoof the reply? If Mallory was on-path, could she spoof all of the above responses with a 100% success rate.Suppose Bob is downloading files from an FTP server by sending a request to the server and the server sends the file to Bob. Suppose Bob’s computer is connecting to the server via point-to-point link. It takes Bob 0.83 seconds to download a 400 MB file and 0.43 seconds to download a 200 MB file. 1. What’s the bandwidth of the link? What’s the RTT? (Note: please use RTT rather than the one-way delay as the propagation delay and you can ignore the transmission delay of the short request and ACK in your calculation.) 2. Please explain why the time to download the 400 MB file is not exactly twice as much as the time to download the 200 MB file?
- Question 1. a. At transport layer UDP uses checksum to detect errors in the received data. Suppose areceiver received 1 1 1 0 1 0 1 1 0 0 1 0 0 1 1 0 and 1 1 0 0 1 1 1 0 1 0 1 0 1 0 1 0 1 as UDP data.What will be the checksum value, please calculate?b. What is ICMP and its functionality? Give two example protocols of application layer thatuses ICMP protocol.Book: Computer networks and internets 6 edition douglas e. Comer Chapter 24 24.8 When a UDP message arrives at a computer, can IP software completely discard the frame header and IP header before passing the UDP message to UDP software for processing? Explain..UDP 12 03 00 1E A3 10 is an example. How long does UDP last?
- IP Address is 69.67.214.64/26 Subnet Mask: Maximum usable hosts: Network Address: Broadcast Address: IP Address is 10.9.3.255/21 Subnet Mask: Maximum usable hosts: Network Address: Broadcast Address: Subnet 192.168.3.0/25 into 7 subnetworks (show working) How many subnets can you get for 27 hosts from 172.16.3.0/26 (show working) Subnet 192.168.1.0/24 into 6 subnetworks but there is a requirement that only the first subnetwork needs to have at least 58 hosts (show working)Packet Tracer - Basic Device Configuration 10.4.3 Packet Tracer - Basic Device Configuration(1).pka Topology You will receive one of three possible topologies. Addressing Table Device Interface IP Address Default Gateway Floor14 G0/0 172.14.5.1/24 N/A Floor14 G0/0 2001:DB8:CAFE:1::1/64 N/A Floor14 G0/0 FE80::1 N/A Floor14 G0/1 172.14.10.1/24 N/A Floor14 G0/1 2001:DB8:CAFE:2::1/64 N/A Floor14 G0/1 FE80::2 N/A Room-145 VLAN 1 172.14.5.35/24 blank Room-146 VLAN 1 172.14.10.35/24 blank Manager-A NIC 172.14.5.50/24 blank Manager-A NIC 2001:DB8:CAFE:1::50/64 blank Reception-A NIC 172.14.5.60/24 blank Reception-A NIC 2001:DB8:CAFE:1::60/64 blank Manager-B NIC 172.14.10.50/24 blank Manager-B NIC 2001:DB8:CAFE:2::50/64 blank Reception-B NIC 172.14.10.60/24 blank Reception-B NIC 2001:DB8:CAFE:2::60/64 blank Objectives · Complete the network documentation. · Perform basic device configurations on a router and a…Packet Tracer - Configure NAT for IPv4 Objectives Configure Dynamic NAT with PAT Configure Static NAT Background / Scenario In this lab, you will configure a router with dynamic NAT with PAT. This will translate addresses from the three internal LANs to a single outside address. In addition, you will configure static NAT to translate an internal server address to an outside address. Instructions In this activity you will only configure router R2. Use a named ACL to permit the addresses from LAN1, LAN2, and LAN3 to be translated. Specify the LANs in this order. Use the name R2NAT. The name you use must match this name exactly. Create a NAT pool named R2POOL. The pool should use the first address from the 209.165.202.128/30 address space. The pool name you use must match this name exactly. All translated addresses must use this address as their outside address. Configure NAT with the ACL and NAT pool that you have created. Configure static NAT to map the local.pka…
- Internet protocol version 4 ( IPV4 ) Represents each IP address as a 32-bit binary number. Internet protocol version 6 ( IPV6 ) represents each IP adress as a 128-bit binary number. WHich of the following best describes the result of using 128-bit addresses instead of 32-bit adresses- 4 times as many address are available- 96 times as many addresses are available - 2^4 times as many adresses are avialabe- 2^96 times as many adresses are availableACLs use wildcard mask to match host. Work out the wildcard masks for the following IP subnets: a. 192.168.0.0 - 192.168.1.255b. 172.16.2.0 - 172.16.2.31c. 12.34.32.0 - 12.34.63.255d. 11.22.16.0 - 11.22.31.255e. 160.160.160.160 - 160.160.160.167How does STP (Spanning Tree Protocol) prevent or stop broadcast storms?a. It examines the source IP address field in each broadcast packet and temporarily blocks traffic from that address.b. It enables routers to choose one set of best paths and ensures that alternate paths are used only when the best paths are obstructed.c. It enables switches to calculate paths that avoid potential loops and artificially blocks the links that would complete a loop.d. It enables firewalls to keep access lists that name hosts known for high-volume broadcast traffic and block those hosts from transmitting to the network.e. It helps routers define the boundaries of a broadcast domain.