Explanation

• The administrative distance of OSPF is 110.
• Administrative distance (AD) or route preference is a number assigned to dynamic routes, static routes and directly-connected routes.
• The value is used in routers to rank routes from most preferred (low AD value) to least preferred (high AD value).

Explanation

• The metric that is commonly used to evaluate classification models and represents the ratio of correctly predicted positive instances to all positive instances is recall.
• Recall is a measure of a classifier’s completeness, and it is also known as sensitivity, hit rate, or true positive rate (TPR).
• The formula for recall is the number of true positives divided by the sum of true positives and false negatives.

Explanation

Spanning Tree Protocol (STP) is a network protocol that ensures a loop-free topology in a switched LAN (Local Area Network) with redundant paths. Its primary purpose is to prevent switching loops, which can cause network instability, packet duplication, and broadcast storms.

STP achieves this by:

• Creating a spanning tree topology
• Blocking redundant paths
• Ensuring a single path for data transmission

By preventing switching loops, STP ensures a stable and efficient network operation.

Explanation

Telnet is a text-based computer protocol that allows users to remotely access and manage a computer or network device. It uses a command-line interface (CLI) to send and receive text-based commands and responses. Telnet is a client-server protocol, where the user's device acts as the client and the remote device acts as the server.

Telnet is typically used for:

• Remote access to servers, routers, and other network devices
• Command-line interface (CLI) access to network devices
• Troubleshooting and debugging network connections
• Remote execution of commands and scripts

Explanation

The "show interfaces" command displays the configurable parameters and statistics of all interfaces on the router, including:

• Interface status (up or down)
• IP address and subnet mask
• Speed and duplex settings
• Number of packets received and transmitted
• Number of errors and collision- And other interface-specific settings and statistics

Explanation

• ".cat" is not a Country Code Top Level Domain (ccTLD).
• It's actually a sponsored top-level domain intended to promote the Catalan language and culture.

Explanation

The SERIALIZABLE isolation level is the strictest transaction isolation level provided by SQL Server. It ensures that transactions are executed in a serialized manner, as if they were the only transaction operating on the database. This means that:

• No other transactions can modify data being read by a transaction.
• No other transactions can insert new data that would affect the results of a transaction.
• No other transactions can delete data that a transaction is using.

Explanation

• A deadlock is a situation in which two or more processes are blocked indefinitely, each waiting for the other to release a resource.
• In this scenario, the processes are said to be in a deadlock because they are unable to proceed due to resource constraints.

Explanation

Explanation

• Antivirus software is designed to detect, prevent, and remove malicious software (malware) from a computer.
• It scans for and removes culprit codes, such as viruses, worms, and trojans, that can harm a computer system.