Which of the following IP class addresses are not allotted to hosts?Each correct answer represents a complete solution. Choose all that apply.
Correct Answer: C,D
Class addresses D and E are not allotted to hosts. Class D addresses are reserved for multicasting, and their address range can extend from 224 to 239. Class E addresses are reserved for experimental purposes. Their addresses range from 240 to 254. Answer option A is incorrect. Class A addresses are specified for large networks. It consists of up to 16,777,214 client devices (hosts), and their address range can extend from 1 to 126. Answer option B is incorrect. Class B addresses are specified for medium size networks. It consists of up to 65,534 client devices, and their address range can extend from 128 to 191. Answer option E is incorrect. Class C addresses are specified for small local area networks (LANs). It consists of up to 245 client devices, and their address range can extend from 192 to 223.
Question 197
Which of the following is the primary international body for fostering cooperative standards for telecommunications equipment and systems?
Correct Answer: D
CCITT is the primary international body for fostering cooperative standards for telecommunications equipment and systems. It is now known as the ITU-T (for Telecommunication Standardization Sector of the International Telecommunications Union). The ITU-T mission is to ensure the efficient and timely production of standards covering all fields of telecommunications on a worldwide basis, as well as defining tariff and accounting principles for international telecommunication services. Answer option A is incorrect. Internet Corporation for Assigned Names and Numbers (ICANN) is a non-profit organization that oversees the allocation of IP addresses, management of the DNS infrastructure, protocol parameter assignment, and root server system management. Answer option B is incorrect. The Institute of Electrical and Electronic Engineers (IEEE) is a society of technical professionals. It promotes the development and application of electrotechnology and allied sciences. IEEE develops communications and network standards, among other activities. The organization publishes number of journals, has many local chapters, and societies in specialized areas. Answer option C is incorrect. The National Institute of Standards and Technology (NIST), known between 1901 and 1988 as the National Bureau of Standards (NBS), is a measurement standards laboratory which is a non-regulatory agency of the United States Department of Commerce. The institute's official mission is as follows: To promote U.S. innovation and industrial competitiveness by advancing measurement science, standards, and technology in ways that enhance economic security and improve quality of life. NIST had an operating budget for fiscal year 2007 (October 1, 2006-September 30, 2007) of about $843.3 million. NIST's 2009 budget was $992 million, but it also received $610 million as part of the American Recovery and Reinvestment Act. NIST employs about 2,900 scientists, engineers, technicians, and support and administrative personnel. About 1,800 NIST associates (guest researchers and engineers from American companies and foreign nations) complement the staff. In addition, NIST partners with 1,400 manufacturing specialists and staff at nearly 350 affiliated centers around the country.
Question 198
Docker provides Platforms-a-Service (PaaS) through __________ and deliver*; containerized software packages
Correct Answer: C
Docker provides Platform-as-a-Service (PaaS) through OS-level virtualization. This form of virtualization allows for the deployment of software in packages called containers. Containers are isolated from each other and bundle their own software, libraries, and configuration files; they can communicate with each other through well-defined channels. OS-level virtualization is lightweight compared to other forms of virtualization because it does not require a hypervisor to create virtual machines. Instead, the Docker Engine enables the containers to run directly within the host machine's operating system but with separate namespaces, which is why it's considered OS-level.
Question 199
The agency Jacob works for stores and transmits vast amounts of sensitive government data that cannot be compromised. Jacob has implemented Encapsulating Security Payload (ESP) to encrypt IP traffic. Jacob wants to encrypt the IP traffic by inserting the ESP header in the IP datagram before the transport layer protocol header. What mode of ESP does Jacob need to use to encrypt the IP traffic?
Correct Answer: B
Jacob needs to use ESP in tunnel mode to encrypt the IP traffic. In tunnel mode, the entire original IP packet, including both the payload and the IP header, is encrypted and then encapsulated within a new IP packet with a new IP header123. This mode is particularly useful for encrypting traffic between different networks, such as in a site-to-site VPN, where the data and security endpoints may differ from the original source and destination IP addresses2. Transport mode, on the other hand, would only encrypt the payload of the IP packet, leaving the original IP header unencrypted123. Since Jacob's goal is to encrypt the entire IP datagram before the transport layer protocol header, tunnel mode is the appropriate choice.
Question 200
If an organization has decided to consume PaaS Cloud service model, then identify the organization's responsibility that they need to look after based on shared responsibility model.
