Networking and Security Midterm

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Questions and Answers

What is the purpose of the Service Set Identifier (SSID) in a wireless network?

  • To act as a network password for association (correct)
  • To connect wired devices
  • To encrypt network data
  • To broadcast network speed

Ad hoc mode requires a centralized device for communication between wireless clients.

False (B)

Name one method to enhance wireless security.

Limit wireless coverage, Disable SSID Broadcast, or Enable Mac filtering.

An ____ is a device that connects multiple networks and passes information between them.

<p>router</p> Signup and view all the answers

Match the Wi-Fi modes with their characteristics:

<p>Infrastructure mode = Uses a centralized device to manage data Ad hoc mode = Communicates directly without a central device WPS = Connects devices with a button or PIN Open network = Requires no password for association</p> Signup and view all the answers

What protocol is used to securely transfer files over a network?

<p>SFTP (D)</p> Signup and view all the answers

SMTP was originally configured to support secure email transmission.

<p>False (B)</p> Signup and view all the answers

Who invented email?

<p>Ray Tomlinson</p> Signup and view all the answers

The protocol used to match a domain name to an IP address is called __________.

<p>DNS</p> Signup and view all the answers

Which of the following protocols is designed for managing networks?

<p>SNMP (A)</p> Signup and view all the answers

Match the type of data transmission with its definition:

<p>Unicast = One-to-One transmission Broadcast = One-to-All transmission Multicast = One-to-Many transmission</p> Signup and view all the answers

Full duplex mode allows a network interface card to send and receive data simultaneously.

<p>True (A)</p> Signup and view all the answers

What is the primary function of DHCP in a network?

<p>Supplies IP addresses to clients</p> Signup and view all the answers

Which protocol is primarily used for transferring files securely?

<p>SFTP (C)</p> Signup and view all the answers

UDP establishes a connection before data transmission.

<p>False (B)</p> Signup and view all the answers

What is the purpose of the DNS protocol?

<p>To translate internet domain names into IP addresses.</p> Signup and view all the answers

The three-way handshake in TCP consists of ______, ______, and ______.

<p>SYN, SYN-ACK, ACK</p> Signup and view all the answers

Match the following protocols with their primary purposes:

<p>SNMP = Monitoring and managing devices ICMP = Reporting transmission errors HTTPS = Secure communication over the web SMTP = Sending emails</p> Signup and view all the answers

Which of the following is a security protocol used to ensure data is sent securely?

<p>TLS (B)</p> Signup and view all the answers

What does MAC stand for in networking?

<p>Media Access Control</p> Signup and view all the answers

WPA is an older security protocol than WEP.

<p>False (B)</p> Signup and view all the answers

Flashcards

TCP

A connection-oriented protocol that allows two devices to form a connection and stream data.

UDP

A connectionless protocol that doesn't establish a connection before transmitting data. Less reliable than TCP.

HTTP

A protocol that allows communication between clients and web servers.

DNS

Translates internet domain names (like google.com) into IP addresses.

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HTTPS

A secure version of HTTP, used for secure communication over the internet.

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Three-way handshake

A process consisting of SYN, SYN-ACK, and ACK messages to establish a TCP connection.

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SNMP

A protocol used for monitoring and managing network devices.

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ICMP

Used by devices to communicate data transmission errors.

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Unicast Transmission

Sending data from one source to one destination.

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Broadcast Transmission

Sending data to all devices on a network.

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MAC Address

A unique 48-bit identifier for a network interface card (NIC).

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Half-duplex

Network communication where devices can send or receive, but not both simultaneously.

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Full-duplex

Network communication where devices can send and receive at the same time.

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WLAN

A wireless network connecting two or more computers, covering small areas like buildings, floors, or rooms.

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Association (WLAN)

Wireless clients connect to wireless networks using SSID, like a password.

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Infrastructure Mode (Wi-Fi)

Wi-Fi mode using a central device (WAP) to manage data between nodes.

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WPS (Wi-Fi)

A button-based connection method using a short PIN for quick Wi-Fi setup.

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Wi-Fi Extender

A wireless repeater, more affordable than multiple access points, extending network range.

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Study Notes

Networking and Security Midterm

  • Protocols:

    • TCP (Transmission Control Protocol): Reliable, connection-oriented transmission of data.
    • UDP (User Datagram Protocol): Connectionless, less reliable, faster data transmission.
    • HTTP (Hypertext Transfer Protocol): Method for web clients and servers to communicate.
    • HTTPS (HTTP Secure): Secure web communication using SSL/TLS.
    • DNS (Domain Name System): Translates domain names to IP addresses.
    • FTP (File Transfer Protocol): Transfers files between computers.
    • SFTP (Secure File Transfer Protocol): Secure method for file transfers.
    • TFTP (Trivial File Transfer Protocol): Simple file transfer protocol.
    • SMTP (Simple Mail Transfer Protocol): Email transmission protocol.
    • IMAP (Internet Message Access Protocol): Protocol for retrieving email messages.
    • POP (Post Office Protocol): Protocol for retrieving email messages.
    • DHCP (Dynamic Host Configuration Protocol): Assigns IP addresses to devices on a network.
    • SNMP (Simple Network Management Protocol): Used to monitor and manage network devices.
    • ICMP (Internet Control Message Protocol): Used for network diagnostics and error reporting.
    • SSL/TLS (Secure Sockets Layer/Transport Layer Security): Protocols for secure communication.
    • SSH (Secure Shell): Secure network protocol for remote login.
    • AES (Advanced Encryption Standard): Encryption method for data security.
    • MAC (Media Access Control): Unique hardware address for network devices.
  • Network Concepts:

    • Communication Protocols: Protocols for exchanging network information.
    • Management Protocols: Protocols for monitoring and managing network activity.
    • Security Protocols: Protocols for ensuring data security during transmission.
    • Three-Way Handshake (TCP): SYN, SYN-ACK, and ACK steps in establishing a TCP connection.
    • Wireless Protocols and Standards: WPS, Wi-Fi, Wireless Security, WAPs (Wireless Access Points), WPA/WPA2.

Network Layer Protocols

  • Unicast: Transmission to a specific destination.
  • Broadcast: Transmission to all devices on the network.
  • Multicast: Transmission to a group of devices.
  • NIC (Network Interface Card): Component inside computers, converts data to network signals.
  • Duplex (Network Connections): Half-duplex – transmit or receive, but not both simultaneously; Full-duplex– transmit and receive at the same time.
  • MAC Addresses (Media Access Control), Unique identifiers for network devices, usually expressed as hex (hexadecimal) numbers including a manufacturer ID.
  • Hubs: Early network devices that broadcast data to all connected devices.
  • Switches: Modern network devices that selectively route data to the intended destination, improving efficiency.
  • Routers: Devices that connect different networks and forward data between them.

Network Protocols, Models, and Security

  • WLAN (Wireless Local Area Network): Network spread over a local area like a building, enabling network access from wireless devices, including smartphones.
  • Service Set Identifier (SSID): Network name used by wireless devices to identify a network.
  • Wi-Fi Modes: Infrastructure: Centrally managed data transmission within a network using a point or access point; Ad hoc: Direct peer-to-peer communication between devices.
  • WPS (Wi-Fi Protected Setup): Security configuration protocol to quickly set up Wi-Fi security.
  • Protection (Network): "Open" networks rely on SSIDs; password-protected networks are more secure.
  • Data Transmission Methods: Exchange of data across a network.
  • Instantaneous Data Transfer: Data transmission for online applications like chats and videoconferences.
  • Digital Data Transmission: Method for capturing data in bits (0's and 1's) from voltage differences to transfer the data across a network.

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