In the context of VPNs, what does "tunneling" specifically refer to?

  • Controlling access to the VPN
  • Encapsulating data in a secure protocol
  • Encrypting the entire network
  • Establishing a direct physical connection
In VPNs, "tunneling" refers to the process of encapsulating data within a secure protocol, often adding an additional layer of encryption to protect the data as it traverses an untrusted network (such as the internet). This ensures the confidentiality and integrity of the data being transmitted.

In a ________ topology, adding or removing devices can be done without disrupting the network.

  • Bus
  • Mesh
  • Ring
  • Star
In a Star topology, adding or removing devices can be done without disrupting the network. In a Star network, all devices are connected to a central hub or switch. If you need to add or remove a device, you can do so without affecting the connectivity of other devices. However, the central hub or switch represents a single point of failure.

In a three-way handshake, after the client sends a SYN packet, the server responds with a _______ packet.

  • ACK
  • FIN
  • RST
  • SYN-ACK
In a TCP three-way handshake, the server responds to the client's SYN (synchronize) packet with a SYN-ACK (synchronize-acknowledgment) packet. This process is a critical part of establishing a reliable connection between the client and server.

In the context of congestion control and flow control, which protocol has built-in mechanisms to handle network congestion?

  • ARP
  • ICMP
  • TCP
  • UDP
TCP (Transmission Control Protocol) includes built-in mechanisms for handling network congestion. It uses techniques like sliding window flow control and congestion avoidance to ensure reliable data delivery and manage network congestion efficiently.

What DNS record type is specifically used for mail servers?

  • A
  • CNAME
  • MX
  • PTR
The MX (Mail Exchange) record is a DNS record type that specifies the mail server responsible for receiving email messages on behalf of a domain. It is used to route email to the correct mail servers.

John is troubleshooting a connectivity issue in a distributed application. He notices that the client machine can reach the server's IP address, but the application is still failing. He suspects that the issue might be related to a specific _________ being blocked or not listening.

  • IP Address
  • MAC Address
  • Port
  • Subnet Mask
John is likely dealing with a port-related issue. Ports are used to identify specific services on a server, and if a port is blocked or the associated service isn't listening, it can result in connectivity problems in a distributed application.

In a modern smart home, various devices such as smart thermostats, smart refrigerators, and smart lights need to communicate with each other. While some devices are wired, most are wireless and have a range of only a few meters. What type of network are these devices most likely using?

  • LAN
  • PAN
  • SAN
  • WLAN
These devices are most likely using a WLAN (Wireless Local Area Network). WLANs are designed for short-range wireless communication within a home or small area, making them ideal for smart home devices with limited communication range.

Which technology allows remote users to securely connect to a private network over the internet?

  • LAN
  • PAN
  • VPN
  • WAN
VPN (Virtual Private Network) technology enables remote users to securely connect to a private network over the internet. It provides a secure and encrypted tunnel for data transmission, making it ideal for remote work, accessing private resources, and maintaining data privacy.

What type of network would a smartwatch connecting to a smartphone typically use?

  • Intranet
  • LAN
  • PAN
  • WAN
PAN (Personal Area Network) is a type of network used for connecting personal devices within an individual's immediate vicinity, like a smartwatch connecting to a smartphone via Bluetooth.

A large enterprise has multiple branches across continents and wants to ensure that it can prioritize certain types of traffic over others, and also wants granular control over routing policies. Which routing protocol would be best suited for this purpose?

  • BGP
  • EIGRP
  • OSPF
  • RIP
BGP (Border Gateway Protocol) is the most appropriate choice for such a scenario. BGP is designed for large-scale networks and provides fine-grained control over routing policies. It's often used for connecting multiple branches across continents, as it allows prioritizing and controlling routes effectively.