Which of the following does not qualify as a benefit of host virtualization? a. Penetration testing can be performed on a computer utilising numerous virtual machines in a simulated network environment. b. There is just one piece of anti-virus software required. c. Security patches are testable. d. Virtualization of the host operating system can be utilised for training reasons.
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Which of the following does not qualify as a benefit of host virtualization?
a. Penetration testing can be performed on a computer utilising numerous virtual machines in a simulated network environment.
b. There is just one piece of anti-virus software required.
c. Security patches are testable.
d. Virtualization of the host
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Solved in 2 steps
- a. List three design goals of a firewall b. What is the difference between a packet filtering firewall and a stateful inspection firewall? c. Write the names of the three types of NAT, with a brief (maximum two lines) meaning for each.On a specific mission, it was determined that the success of an attack to a given system would be only possible if at least one of the vulnerabilities get successfully exploited. After some initial simulations conducted on a network that is similar to the target the following probabilities of successful exploitation were: - 30% of the time the IPs of the key components were captured - 10% of the time the MACs of the key components were captured - 40% of the time the Ports giving access to the target network were captured - 65% of the time the OS versions of the main components were obtained - 50% of the time the key services needed for the attack were compromised The attack would be deployed only if a breach was obtained within the allocated time frame. The mechanisms by which each of the above impacts the attack were also tested and proved to be independent on how they actuate. The experiments showed that knowing the IPs would allow a successful attack 25% of the time, while…Suppose that you are a computer virus writer; hence, you know that you need to store a copy of the code for your virus inside the virus itself. Moreover, suppose you know that a security administrator is also aware of this fact and will be using it to detect the presence of your virus in operating systems files. Explain how you can hide the embedded copy of your virus so that it is difficult for the security administrator to find it. Explain how a stateless firewall would block all incoming and outgoing HTTP requests. What is the encryption of the following string using the Caesar cipher: THELAZYFOX? Why can't Bob use the pair (6; n) as an RSA public key, where n = pq, for two large primes, p and q?
- Suppose management wants to create a "server farm" for the configuration in Figure 8-14 that allows a proxy firewall in the DMZ to access an internal Web server (rather than a Web server in the DMZ). Do you foresee any technical difficulties in deploying this architecture? What are the advantages and disadvantages of this implementation?Why might the author of a malware with a system corruption payload choose to make the malware inflict irreversible damage to a system? For example, suppose the malware overwrites a target’s hard disk with 0s, destroying their data.A stateful firewall is placed between a protected network 3.3.3.0/24 and the public Internet. Hosts outside the protected network are to be allowed to access a web server (port 80) at 3.3.3.10 and an SMTP server (port 25) at 3.3.3.11. Hosts on the protected network are allowed to access outside web and E-mail servers, except for those located on the network 4.4.0.0/16. All traffic not explicitly allowed is to be denied. Design a rule base for the firewall to implement this policy.
- 1 ) Listen During a denial-of-service attack, a network administrator blocks the source IP with the firewall, but the attack continues. What is the most likely cause of the problem? Denial-of-service worm has already infected the firewall locally. A firewall can't block denial-of-service attacks. The attack is coming from multiple, distributed hosts. Antivirus software needs to be installed.A. Mean time between failures is the average time it takes to repair a serviceable device True False B. Snapshot backup can either be full, incremental or differential and can complete much faster than traditional backups, but require systems and software that supports them. True False C. An incident is any meaningful change in the network’s state that is both detectable and happened at a specific time. True FalseYou are given the following “informal firewall policy” details to be implemented usinga firewall like that in the following figure: 1. E-mail may be sent using SMTP in both directions through the firewall, but it must be relayed via the DMZ mail gateway that provides header sanitization and content filtering. External e-mail must be destined for the DMZ mail server.2. Users inside may retrieve their e-mail from the DMZ mail gateway, using either POP3 or POP3S, and authenticate themselves.3. Users outside may retrieve their e-mail from the DMZ mail gateway, but only if they use the secure POP3 protocol and authenticate themselves.4. Web requests (both insecure and secure) are allowed from any internal user out through the firewall but must be relayed via the DMZ Web proxy, which provides content filtering (noting this is not possible for secure requests), and users must authenticate with the proxy for logging.5. Web requests (both insecure and secure) are allowed from anywhere on the…
- A Denial-of-Service (DoS) attack is where an attacker overloads a victim’s network or computer such that normal processing services cannot occur. Mallory launches an attack by manipulating the source address field of an ICMP request and using a network broadcast address as the destination address. What kind of DoS attack is Mallory executing? a. DNS-based DDoS b. DRDoS using UDP c. A ‘Smurf’ attack d. A ‘Ping of Death’ attackAssume that a self-driving, software-driven (for example the “Tesla”) car connects to conventional computer networks for communication and update purposes. (a) Explain how the Separation of Duty principle could be applied to prevent an attacker from installing a malware program on the software within the car. Include any limitations to your approach. (b) Next, Bob has a special mobile application that communicates wirelessly with his car using keystream xor encrypted messages, and Bob’s spouse happens to use the same application on a separate device. Notably, the application uses the same keystream bits for both Bob and his spouse, since they both use the car. Explain any attacks you can conceive against their car keys/car.Answer it True or False only. No explanation. Thanks 1. Active attacks involve some modification of the data stream or the creation of a false stream. 2. Denial of service prevents or inhibits the normal use or management of communication facilities. 3, The vulnerabilities of a distributed system are broadly grouped based on the functional blocks therein defining the distributed system. 4. Access or Admission control determines the authorized participation of a resource, a user, or a service within a distributed system. 5. Peer to Peer (P2P) systems constitute a decentralized variant of distributed systems.