In the client-server model, who initiates communication by requesting services?

The fundamental dynamic in a client-server interaction is that a client initiates and a server responds.

In any client-server interaction, the ______ is the initiator of communication, while the ______ is the responder, listening for and fulfilling requests.

What is the main role of the client in a client-server interaction?

Which of the following is an example of a client?

Fill in the blank: The entity that responds to requests by providing the requested services or resources is called the _______.

Which of the following best describes a 'Requester' in the context of a client?

Which of the following is NOT an example of a server?

What is the role of a 'Listener' in the context of a server?

What does an IP address (Internet Protocol address) serve as in a computer network?

Which of the following is NOT a function of an IP address?

Fill in the blank: IP addresses act as unique ________ for devices on a network, distinguishing one computer from another.

What is the IP address of the client device shown in the network diagram?

What is the main function of a port number in a network connection?

What does the Virtual Channel Concept enable a server to do?

Which of the following is NOT a transport protocol mentioned under Connection Types?

Fill in the blank: Ports are crucial for directing incoming network traffic to the specific ______ or application that is meant to receive it.

True or False: An IP address alone is enough to uniquely identify a specific network endpoint for an application.

A socket address is the combination of an IP address and a ________.

According to the formula for a precise network connection, what two components are combined to form a socket address?

Which layer in the OSI Model is responsible for applications such as HTTP, FTP, and SMTP?

Which layer in the TCP/IP Model is responsible for IP addresses?

At which layer do IP addresses operate in the OSI Model?

At which layer do port numbers operate in the TCP/IP Model?

In the OSI Model, the Presentation layer is Layer 6.

In the TCP/IP Model, the Application layer is Layer 1.

What is the first step in establishing a client-server connection?

Fill in the blank: The process often begins with a human-readable domain name (e.g., www.example.com). The client's first step is to use the _______ to translate this domain name into the server's numerical IP address.

What does the client do after obtaining the server's IP address?

Fill in the blank: To receive the server's response, the client's operating system must open a return channel by assigning a temporary, high-numbered port from the _______ range (49152-65535).

What defines the complete, two-way communication channel in a client-server connection?

Socket addresses effectively bridge the _______ and _______ layers to create a complete, application-specific endpoint.

What is formed between the client's dynamic port and the server's well-known port?

Let's walk through a practical example. When you type a website address like https://www.example.com into your browser, a complex but rapid sequence of events occurs to establish a secure connection between your client (browser) and the server hosting the website.

1. DNS Resolution
Your browser sends a request to a DNS server to resolve www.example.com. The DNS server responds with the corresponding IP address, for instance, _________.

When you type a website address like https://www.example.com into your browser, a complex but rapid sequence of events occurs to establish a secure connection between your client (browser) and the server hosting the website. Because the URL uses ________, your browser knows to connect to the secure web port. It initiates a TCP connection to the server's IP address (93.184.216.34) on port 443.

When you type a website address like https://www.example.com into your browser, a complex but rapid sequence of events occurs to establish a secure connection between your client (browser) and the server hosting the website. 3. Client-Side Port Allocation Your computer's operating system assigns a temporary, high-numbered port for this specific browser tab's connection. Let's say it assigns port _________. This port acts as the "return address" for the server's responses. Which of the following is the correct port number assigned in this scenario?

Which port is used by the server socket?

Which port number is used for File Transfer Protocol (FTP) for data and control channels?

Which service uses port number 22 for secure remote access and management?

What is the description of the service that uses port number 25?

Fill in the blank: Port number 53 is used for the __________ service.

Fill in the blank: The Hypertext Transfer Protocol (HTTP) uses port number __________ for standard web browsing.

Which port number is used for HTTPS (HTTP Secure for encrypted and secure web browsing)?

MySQL database servers listen on which registered port for incoming TCP connections from clients?

Microsoft's Remote Desktop Protocol (RDP) uses which port to enable remote graphical connections to Windows machines?

What is the range of registered ports?

Dynamic/Private ports are also known as ephemeral ports.

Each connection uses a unique dynamic port from the client to the server.

Which protocol is connection-oriented and built for reliability?

Which protocol uses a 'three-way handshake' to establish a reliable connection before any data is sent?

Which protocol guarantees that data packets are delivered, arrive in the correct order, and are error-checked?

Which protocol is best for applications where data integrity is paramount, such as Web Browsing (HTTP/HTTPS), Email (SMTP), and Secure Shell (SSH)?

Which protocol is connectionless and built for speed?

Which protocol sends data immediately without a handshake, minimizing latency?

Which protocol is best for time-sensitive applications where speed is more important than perfect reliability, such as DNS lookups, live Video Streaming, VoIP, and online gaming?

Which protocol does NOT retransmit lost packets and requires error handling to be built into the application if needed?

What is the process called when attackers scan a target's IP address for open ports to identify running services and search for known vulnerabilities associated with that service to attempt an exploit?

Which type of attack involves flooding a specific port with an overwhelming number of requests, consuming the server's resources and rendering the legitimate service unavailable to users?

If communication over a port is unencrypted, an attacker can position themselves between the client and server to intercept, read, or even modify the data being transmitted. What is this type of attack called?

Using services on unencrypted ports (like FTP on port 21 or HTTP on port 80) transmits data, including credentials, in plaintext, making it easily readable if intercepted. What is this vulnerability called?

Fill in the blank: The complete endpoint (______), ensuring precise, application-level communication.