Lab Manual For Comptia A+ Guide To It Technical Support
10th Edition
ISBN: 9780357440780
Author: Jean Andrews, Joy Dark, Jill West
Publisher: Cengage Learning
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Chapter 8, Problem 3TC
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Given:
A server is running both a Telnet server and an FTPS server.
To find:The reason that the telnet server is not recommended for using a remote computer...
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b. Suppose that you are hired by a local company to set up a router that both serves as
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has a single public IP address?
You are troubleshooting an issue and you think that it is a problem with the DHCP server configuration. Client get an IP address, they can ping IP addresses on the same network and on the internet, but they cannot pull up webpages. What is a likely cause of misconfiguration on the DHCP server?
a.) incorrect ntp server
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A hacker just set up a TCP connection with a web server in Chicago, Illinois, claiming he is coming in with a source IP address that clearly belongs to a network in Copenhagen, Denmark. In examining the session logs, you notice that he was able to complete the three- way handshake for this connection in 10 milliseconds. How can you use this information to prove he is lying?
Chapter 8 Solutions
Lab Manual For Comptia A+ Guide To It Technical Support
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- The following gives some facts about Evasion attack (refer to the following figure which shows the attacking scenario for the facts). Please select the correct order to make this attack work. a. Packet "R" is buffered; b. Packet "EWT" is sent and accepted by NIDS; c. Finish three-way handshake to establish a TCP connection to the destination; d. Packet SYN carrying data "R" is sent; e. Packet "EWT" is accepted by the destination; f. Packet "R" and "EWT" are assembled at the destination . Question 11 options: dabcef dacbef dbacef dcabefarrow_forwardDNS uses UDP instead of TCP. If a DNS packet is lost, there is no automatic recovery. Does this cause a problem, and if so, how is it solvedarrow_forwardWhen the FTP client is connected to the FTP server, the Transport Layer protocol TCP created a reliable session. TCP is routinely used during a session to control datagram delivery, verify datagram arrival, and manage window size. For each exchange of data between the FTP client and FTP server, a new TCP session is started as shown in this WireShark screenshot: 1.Identify Three-way handshake packets and write them here? 2.Identify and list the graceful termination of communication between FTP client and server? 3. what is the port number of FTP protocol? 4. Identify the source and distention IP addresses?arrow_forward
- Suppose you want your firewall to block all incoming Telnet connections but to allow outbound Telnet connections. One approach would be to block all inbound packets to the designated Telnet port (23). (a) We might want to block inbound packets to other ports as well, but what inbound TCP connections must be permitted in order not to interfere with outbound Telnet? (b) Now suppose your firewall is allowed to use the TCP header Flags bits in addition to the port numbers. Explain how you can achieve the desired Telnet effect here while at the same time allowing no inbound TCP connections.arrow_forwardA person wishes to sniff the packets going to the outside world from your LAN. How is he going to check the information passing out or your network without letting the host or anyone in thenetwork know?What if it is a switched LAN or a broadcast LAN?A potential security threat with all the TCP based network services is that anyone can remotely conduct experiments to know whether a particular service is available. for instance, is an attempt to connect certain port on specific machine (say M) any remote user can check if M is running an SMTP server on port 25. Under this scenario it becomes easy to find machines that aresusceptible to send mail bugs. In order to combat such a potential threat, can you come up with a method through which only authorized users (who possess a certain secret) will be able to getresponse to a TCP SYN packet?elaborate your method with the help of an example.Give a step by step description of both the scenarios.arrow_forwardDNS uses UDP instead of TCP If a DNS packet is lost , there is no automatic recovery. Does this cause a problem and if so, how is it resolved?arrow_forward
- - When the load is greater than the capacity, the delay ..... c. Goes to infinity d. Goes to zero e. Becomes stable decreases b. Increases linearly -TCP is considered a reliable protocol. Which one of the following is used to insure reliability? Route selection b. Acknowledgement c. Session checkpoints d. System authentication e. All of them - Which layer of the 7 layer OSI model does the ping command operate? physical b. Network c. Transport d. Application e. Data link the first packet into the queue is the first packet out of the queuearrow_forwardWrite the Static NAT configuration commands for the Gateway Router with respect to the given Figure. Choose appropriate ip addresses from the given network address. 192.168.0.0/24 4.4.4.0/24 fa 0/1 eth 0/0/0 Computer A Router S1arrow_forwardIn 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?arrow_forward
- What recon activity does the attacker perform on this network? What port or machine (choose one) is the single target of this recon? Reference a range of packet numbers. [Example]: The attacker takes pictures of each house in the neighborhood, as seen in the video footage (timestamps 12:34 to 23:45). The target of these pictures is always the door of each house.arrow_forwardOSPF messages and ICMP messages are directly encapsulated in an IP datagram. If we intercept an IP datagram, how can we tell whether the payload belongs to OSPF or ICMP?arrow_forwardif initial values of the sequence number used by both TCP SYN and SYC/ACK packets are always constant values(e.g., both are 0) it will make the TCP session vulnerable to TCP session hijacking attacks. true or false?arrow_forward
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