suppose that we are continuously transmitting packets from earth to moon and the 5th packet is lost and no other packets or acks are lost. how many and which packets get retransmitted?

In the /var/log directory or any of its subdirectories, the commands rm -rf older and similar ones will list all files and directories held by the root user.

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A nominal scale is a scale whose numbers serve only as labels or tags for identifying and classifying objects.

There is a strict one-to-one correspondence between the numbers and the objects, meaning that each number represents a single object, and each object has a single number assigned to it. For example, a nominal scale might be used to assign numbers to colors. In this case, the number 1 might be assigned to the color blue, the number 2 might be assigned to the color green, and so on. This scale would not provide any information about the relative qualities of the colors but would allow them to be identified and classified by their number.

Nominal scales are most commonly used to identify objects in databases or surveys. For instance, a survey might ask respondents to select a number between 1 and 5 to indicate their level of satisfaction. This scale would use numbers to classify the respondents into categories, such as "very satisfied" or "somewhat satisfied".

Nominal scales are useful for quickly identifying and classifying objects without the need for a more detailed scale. However, nominal scales cannot be used to measure differences in magnitude or magnitude between the objects being classified.

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Among the given options, the only true statement about the international style is that it uses a rigid typographic grid (option b). The international style is a design movement that emerged in the 1920s and 1930s, characterized by simplicity, minimalism, and functionality.

It is often associated with architecture and industrial design, but it also influenced graphic design. In terms of graphic design, the international style is known for its use of sans-serif typefaces, asymmetrical layouts, and an emphasis on hierarchy and legibility. The use of a rigid typographic grid is also a common characteristic of the international style, as it helps to create a sense of order and consistency in the design. However, symmetrical balance is not a defining feature of the international style, and it often employs asymmetrical layouts for a more dynamic and modern look. Similarly, the international style typically favors sans-serif typefaces over serif typefaces.

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In the network model, the user perceives the database as a collection of records in 1:M relationships, where each record can have more than one parent. The correct option is b. network.

In the network model, the database structure is depicted as a graph consisting of nodes (or segments) that represent records, and links that represent relationships between these records. In this model, there is no fixed hierarchy or parent-child relationship between records. In this model, one record can have multiple parent records, while a child record can have more than one parent. To represent the network structure of a database, a schema diagram is typically used. The diagram shows the entities (or types of records) and the relationships between them.

Nodes in the graph represent entities, while lines or links represent relationships between entities. The type of relationship is usually represented by a symbol, such as a triangle, circle, or rectangle. The network model was developed in the late 1960s and early 1970s as an alternative to the hierarchical model. The network model is more flexible than the hierarchical model because it allows multiple relationships between records. It is also more powerful than the hierarchical model because it can represent complex relationships between records.

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To increase the security of data stored on an RODC, the domain objects that are not replicated to RODCs can be configured. This can be achieved by specifying domain objects that are not replicated to RODCs.

A read-only domain controller (RODC) is a domain controller that stores a copy of an Active Directory database. An RODC is usually used in locations where network security is poor or non-existent. This ensures that even if the RODC is compromised, the security of the entire network is not jeopardized.

Active Directory consists of the following types of domain controllers:

An RODC is a new category of the domain controller that has been introduced to improve security at remote locations. The primary function of an RODC is to cache user passwords. The use of an RODC will not be able to modify user passwords, computer accounts, or domain metadata stored on RWDCs to ensure that the RODC is secure.

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If you are experiencing display problems on your computer, the troubleshooting technique you might attempt first is checking to see that all cables are properly connected. The correct option is C.

If you are experiencing display problems on your computer, the first troubleshooting technique to attempt would be to check that all cables connecting the monitor to the computer are properly connected. This includes the power cable, video cable (such as VGA, DVI, or HDMI), and any other cables or adapters that may be used.

If the cables are not properly connected, this can cause a variety of display problems, including a blank screen, fuzzy or distorted images, or no signal detected by the monitor.

If checking the cables does not solve the problem, then you could try other troubleshooting techniques such as updating the video drivers, adjusting the display settings, or testing the monitor on another computer. Only if none of these methods solve the problem would it be appropriate to contact a professional for assistance or consider purchasing a new monitor.

Thus, option C is the correct answer.

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The new feature in Windows Server 2016 that allows up to eight identical physical adapters on the host system to be configured as a team and mapped to a virtual switch is called NIC Teaming.

NIC stands for Network Interface Card. NIC Teaming allows you to bundle several physical network interfaces together to form a single logical interface that provides fault tolerance and high-speed links.

By configuring multiple physical adapters as a team, you can increase the network bandwidth and provide redundancy in case a network adapter fails.

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There are three options for configuring the quorum model in a failover cluster: Node Majority, Node and Disk Majority, and Node and File Share Majority. So. the correct option is all of these.

In a failover cluster, there are several options for configuring the quorum model. These include:

Node Majority: This quorum model uses a majority of the cluster nodes, so at least half of the nodes must be online and functional for the cluster to stay up.

Node and Disk Majority: This quorum model uses a combination of cluster nodes and disks. All the nodes and a majority of the disks must be online for the cluster to stay up.

Node and File Share Majority: This quorum model uses a combination of cluster nodes and a designated file share witness. All the nodes and the file share must be available for the cluster to stay up. All of these options require a majority of nodes to be online and functional in order for the cluster to stay up.

So, the correct option is All of these as Node Majority, Node and Disk Majority, and Node and File Share Majority are required for configuring the quorum model.

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The given statement "the integer data member thesize of class vector is strictly speaking optional. it adds to the efficiency of various operations, but if it were missing from the class, the size of the array of data values could always be determined by counting while iterating over the array" is true because while the thesize data member of the vector class is used to efficiently store and retrieve the size of the vector, it is not strictly necessary for the functioning of the class..

In C++, a vector is a data structure that stores a collection of items. It is similar to an array, except it may be dynamically resized. In C++, vectors are used to store data in sequential order.

Iterators are used to access the elements of a vector, which are stored in contiguous memory. The operator[] must be used to access the vector's elements.

The vector::push back() and vector::pop back() methods can be used to increase or reduce the size of a vector. The class vector's integer data element "thesize" is absolutely optional.

It improves the performance of several operations, but if it is not included in the class, the size of the array of data values can always be obtained by counting while iterating through the array. It is true

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The "Data Offset" field, also known as the "Header Length" field, is a TCP header field that gives the receiving network device the knowledge it needs to determine where the real data payload starts.

The transmission and receiving processes are identified by TCP using the IP address and port number (16-bit value), respectively. A TCP connection is uniquely identified by the two end sockets, which are pairs of an IP address and port number.

The window size refers to how much data a source can send before an acknowledgement is required.

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To provide multiple paths between switches, you can implement a technique called link aggregation or port aggregation, also known as EtherChannel or NIC teaming.

Link aggregation groups multiple physical links into a single logical link, providing redundancy and increased bandwidth.

There are two types of link aggregation:

To implement link aggregation, you need to ensure that the switches and the network interface cards (NICs) support the technique. You also need to configure the switches and the NICs to use the same link aggregation method. Once configured, the switches will recognize the link aggregation and automatically load balance traffic across the links.

By providing multiple paths between switches, you can ensure that if one link goes down, an alternate path is available, and the network continues to function without interruption.

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The statement given, in the context of information security, confidentiality is essentially the same as privacy, is false.

Confidentiality and privacy are related concepts in information security, but they are not the same thing. Confidentiality refers to the protection of sensitive or private information from unauthorized access or disclosure, while privacy refers to an individual's right to control their personal information and how it is collected, used, and shared.

In the context of information security, confidentiality is primarily concerned with maintaining the secrecy and confidentiality of sensitive or private information, such as personal identifiable information (PII), trade secrets or intellectual property, while privacy is focused on ensuring that people have control over their own personal information.

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The given statement, "lattice-based access control specifies the level of access each subject has to each object if any" is true.

Lattice-based access control refers to a security policy that restricts access control to a set of pre-defined policies. In the field of computer security, this is often used as a formalism for defining and enforcing a security policy.

It is a well-known and well-regarded theory that is widely utilized in access control policies for information systems. The lattice model is based on two main components: security levels and clearance levels.

The security levels refer to the relative security requirements of various components of the system, while clearance levels refer to the authorization levels of various users.

Both security levels and clearance levels are organized into a lattice structure, with the most restrictive level at the top and the least restrictive level at the bottom.

In this structure, each object has an assigned security level, and each subject has an assigned clearance level. Each subject may access any object whose security level is equal to or less restrictive than the subject's clearance level.

Therefore, the statement "lattice-based access control specifies the level of access each subject has to each object if any" is true.

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The number of bits per baud that can be sent in each of the following cases is determined by the number of points in the signal constellation.  a. For a constellation with 2 points, there is 1 bit per baud. b. For a constellation with 4 points, there are 2 bits per baud. c. For a constellation with 16 points, there are 4 bits per baud. d. For a constellation with 1024 points, there are 10 bits per baud.

Each point in the constellation represents a unique symbol that can be transmitted. The number of bits per baud is equal to the base-2 logarithm of the number of points in the constellation.

If the signal constellation has 2 points, then each baud can send 1 bit of information.
If the signal constellation has 4 points, then each baud can send 2 bits of information.
If the signal constellation has 16 points, then each baud can send 4 bits of information.
Finally, if the signal constellation has 1024 points, then each baud can send 10 bits of information.

To sum up, the number of bits per baud that can be sent in each of the following cases is determined by the number of points in the signal constellation: 1 bit for 2 points, 2 bits for 4 points, 4 bits for 16 points, and 10 bits for 1024 points.

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Answer:

Selenium - Web browser automation tool

JMeter - Load testing tool

QTP - Functional testing tool

Quality Center - test management tool

Bugzilla - Defect - Tracking tool

Explanation:

Option-A: In Oracle, a strictly relational table can be accessed as if it were an object table using a mechanism called Object View.

A view is a stored SQL query that allows a user to query the data in multiple tables as if they were a single table.An object table is a table that is built with object type columns. An object type is a custom-defined composite data structure that is used as the datatype for one or more columns of a table or object view. For each row of an object table, the object type determines the attributes that are stored in the object column.

An object view is a type of view that is used to access data in a strictly relational table as if it were an object table. To create an object view, you define an object type that maps the columns of the relational table to the attributes of the object type. The object view then exposes the columns of the relational table as attributes of the object type, and you can use the object view to query and manipulate the data as if it were an object table.

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Answer:  The process of encrypting blocks of plaintext by putting them through a series of substitution and permutation operations using a specific encryption algorithm is called a block cipher.

Block ciphers operate on fixed-length groups of bits, or blocks, and transform them into the same-sized blocks of ciphertext. The block cipher takes a block of plaintext as input, performs a series of substitution and permutation operations according to a secret key, and outputs a block of ciphertext. The same key is used to encrypt and decrypt the data.

Block ciphers are commonly used in symmetric-key encryption algorithms such as AES (Advanced Encryption Standard) and DES (Data Encryption Standard).

Explanation:

The SUM function in Excel is used to add up a range of values in a worksheet. You would typically use the SUM function in Excel when you need to calculate the total of a set of numbers, such as when you are working with financial data, inventory data, or any other data that requires adding up a group of values.

For example, if you have a column of sales data for different products, you can use the SUM function to quickly calculate the total sales for all products. Similarly, if you have a row of expenses for different categories, you can use the SUM function to calculate the total expenses for the period.

The SUM function is a versatile tool that can be used to perform basic calculations as well as more complex ones. It can be used on its own or in combination with other functions and formulas to create more advanced calculations.

Overall, if you need to add up a range of values in your Excel worksheet, the SUM function is likely the best option to use.

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The Ethernet standard that can deliver up to 5 Gbps of bandwidth over CAT 5e and CAT 6 cabling is IEEE 802.3an. This is a very high-speed Ethernet standard and is capable of transmitting data at a rate of 10 Gigabits per second over 4 pairs of twisted copper cabling.

It is designed for applications such as data centers, high-speed storage networks, and video/audio streaming. The IEEE 802.3an standard is based on the 1000BASE-T technology, which provides the highest data rate of any twisted-pair-based Gigabit Ethernet technology. The 1000BASE-T protocol supports data rates up to 1000Mbps over 4 pairs of CAT 5e or CAT 6 cabling. However, the IEEE 802.3an standard is an improved version of the 1000BASE-T technology and is capable of delivering up to 5 Gbps of bandwidth over the same type of cabling.

The IEEE 802.3an standard also supports 1000BASE-T, 1000BASE-T2, 1000BASE-X, and 10GBASE-T technologies. This ensures compatibility with existing 1000 Mbps and 10 Gbps Ethernet networks. The IEEE 802.3an standard also supports full-duplex transmission, which means that data can be transmitted in both directions at the same time.

In summary, the IEEE 802.3an standard can deliver up to 5 Gbps of bandwidth over CAT 5e and CAT 6 cabling, making it ideal for applications such as data centers, high-speed storage networks, and video/audio streaming.

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While redundancy can improve reliability and availability, it also comes with potential issues. These include increased costs, added complexity, and the risk of cascading failures.

1. Increased Costs: Implementing redundancy often requires additional investment in equipment, infrastructure, and maintenance. This can lead to higher initial and ongoing expenses, which may not be affordable for all organizations.
2. Added Complexity: Introducing redundancy can make a system more complex to design, implement, and manage. This can result in additional training, support, and administration resources, potentially decreasing efficiency and productivity.
3. Cascading Failures: In some cases, redundant components may not function as expected, causing a cascading failure in the system. This can occur when a single point of failure triggers a series of subsequent failures in other components, potentially leading to a complete system breakdown.
4. Overconfidence: Relying on redundancy can create a false sense of security, causing organizations to neglect regular maintenance and system monitoring. This can lead to undetected issues that may eventually result in system failures.
5. Inefficient Resource Utilization: Redundancy can lead to underutilization of resources, as redundant components are often idle during normal system operation. This can result in wasted energy, space, and financial resources.
6)In summary, while redundancy can be beneficial in maintaining system reliability and availability, it is important to consider the potential issues associated with its implementation. Organizations should weigh the benefits and risks before implementing redundancy in their systems.

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Blade, hstex, and netanalysis are available through the software forensic tool. Digital Detective, a windows-based data recovery programme, enables plug-ins that enhance its superior data recovery and analysis abilities.

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The End-User License Agreement (EULA) typically includes rules specifying how the software may be used, warranty disclaimers, and rules concerning duplication of the software. The EULA is a legally binding agreement between the end-user (the person using the software) and the software's developer or publisher. It outlines the rights and obligations of each party.

The EULA typically includes rules about how the software may be used, such as whether the user can install it on multiple computers or make copies of the software. It also outlines what activities the user may and may not do with the software, such as making modifications or redistributing it.

The EULA typically also includes a warranty disclaimer, which states that the software is provided “as is” and that the developer or publisher is not liable for any damages resulting from its use. Finally, the EULA usually outlines rules concerning duplication of the software. This section may specify that the user can only make one copy of the software and that further duplication is prohibited.

In summary, the EULA typically includes rules specifying how the software may be used, warranty disclaimers, and rules concerning duplication of the software. It is important for end-users to read and understand the EULA before using the software.

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A test bed is an environment with all the necessary hardware and software to test a software system or component.

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Answer:

See below.

Explanation:

Here's an algorithm to calculate the perimeter of a rectangular object with given length and breadth.

Here's the QBASIC program to implement the above algorithm.

CLS

INPUT "Enter the length of the rectangular object: ", L

INPUT "Enter the breadth of the rectangular object: ", B

P = 2 * (L + B)

PRINT "The perimeter of the rectangular object is: "; P

END

In this program, the INPUT statement is used to get the values of length and breadth from the user, which are then used to calculate the perimeter of the rectangular object using the formula mentioned in the algorithm. The PRINT statement is used to display the calculated perimeter.

Lisa's computer needs can be met by purchasing a laptop with a USB port. This type of computer is portable and can be taken with her to school, and the USB port will allow her to plug in external devices such as a keyboard, mouse, external hard drive, etc.

When shopping for a laptop, it is important to consider the type of processor, RAM, storage, and display. Processors can range from the budget-friendly Celeron and Pentium to the more powerful Core i3, i5, and i7 models. RAM and storage size will vary by model, but it is important to get enough RAM to handle multitasking and enough storage space to store documents, photos, music, and videos.

When considering the display, a larger display will make it easier to see what is on the screen, but it will also make the laptop heavier and more difficult to transport. It is also important to consider the brand and quality of the laptop, as well as warranty and customer service options.

In addition, there are many accessories that can be purchased to enhance the laptop's performance and usability, such as a carrying case, mouse, external hard drive, and more. Other options including Supercomputer, personal computer, and microcomputer are incorrect. The best type of computer containing all desired features is Laptop.

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Darren should use the search term "art history*" to get search results that begin with the words "art history." Option A is the correct answer.

The asterisk () is a wildcard character that represents any combination of letters or words that come after "art history." This search term will return results that start with "art history" followed by any word or phrase.

For example, a search for "art history" might return results such as "Art history in Europe" or "Art history degree programs." Using quotes (") or vertical bars (|) will limit the search results to exact phrases or multiple keywords, respectively. Using a negative sign (-) before a term will exclude it from the search results.

Therefore, option A:  "art history*" is the correct answer.

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Answer:

he will type b part

Explanation:

A data dictionary can be used to record the database structure. So, the correct option is A.

A data dictionary is a software component that stores metadata about the data in a database system. A data dictionary is a source of documentation for an application, including information about schema objects such as tables, columns, and indexes, as well as integrity constraints, and system-level information like privileges and roles.

A data dictionary can be used for the following purposes:

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The most secure option for the type of passcode that can be entered to access a mobile device is a complex alphanumeric password.

This is because it involves the use of letters, numbers, and symbols, making it more difficult to guess or crack. It is important to avoid using common passwords or passcodes such as "1234" or "password" as they can be easily guessed. Additionally, it is recommended to change the passcode frequently to prevent unauthorized access to the device. Important factor in the security of a mobile device passcode is how it is stored and encrypted. It is recommended that the passcode is stored securely on the device using strong encryption techniques, such as AES-256.

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Today, most data kept by companies is stored in databases. However, there are some cases where text files are appropriate.

It may be appropriate to use text files when the data needs to be easily shared and edited by multiple users without the use of a database. Additionally, text files may be used in smaller projects or for temporary storage. For example, a configuration file for a program may be stored as a text file. Steps that must be taken when a data file is used by a program are:

Open the file for reading or writing: This step is performed to give the computer access to the file and ensure that the file is properly read or written.

Read or write to the file: This is the step where data is either read from or written to the file. This data can be manipulated or processed by the program.

Close the file: Once the program is finished with the file, it should be properly closed to free up resources and ensure the file is saved correctly.

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The most common topology and technology combination in use today is switched/Ethernet. So, the correct option is B.

Ethernet is a networking technology that allows devices to communicate with one another. It's a wired networking standard that is frequently used in local area networks (LANs). Ethernet is the most widely used networking technology. A switched network, on the other hand, is a network that uses switches to connect devices together.

The most common topology and technology combination in use today is switched/Ethernet. This is because it is a widely used networking technology that is commonly found in LANs, and it is also reliable and efficient. A switched network uses switches to connect devices together, which makes it more efficient than other types of networks, such as a bus or a ring.

Furthermore, Ethernet is widely used because it is simple to use, easy to install, and cost-effective. Switched networks are often used in enterprise environments, where they are used to connect multiple devices together in a single network.

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