In which scenario would the Stop-and-Wait protocol be less efficient compared to the sliding window protocol?
- High bandwidth, long propagation delay
- High bandwidth, short propagation delay
- Low bandwidth, long propagation delay
- Low bandwidth, short propagation delay
The Stop-and-Wait protocol would be less efficient compared to the sliding window protocol in scenarios with low bandwidth and short propagation delay. In such cases, the efficiency of data transfer is limited due to the protocol's stop-and-wait nature.
The Ethernet standard that supports a maximum data rate of 40 Gbps is _______.
- Ethernet
- Fast Ethernet
- Gigabit Ethernet
- 40 Gigabit Ethernet
The correct answer is "40 Gigabit Ethernet." This standard, often abbreviated as 40GbE, supports a maximum data rate of 40 gigabits per second (Gbps), making it a high-speed option for network connections.
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.
What function ensures that frames are only sent to the specific port associated with the destination MAC address in a switch?
- ARP Table
- IP Table
- MAC Table
- NAT Table
A switch maintains a MAC address table that associates MAC addresses with the physical ports on the switch. When a frame arrives, the switch looks up the destination MAC address in its MAC table and forwards the frame only to the port associated with that MAC address.
What process converts digital data into analog signals suitable for transmission over analog mediums?
- Decoding
- Demodulation
- Encoding
- Modulation
Modulation is the process of converting digital data into analog signals. It's essential for transmitting digital information over analog communication channels, such as radio waves, where analog signals are used for communication.
If a website's URL begins with "https://", what additional layer of security does it provide compared to "http://"?
- It adds authentication for users
- It encrypts the data transmitted between the client and the server
- It improves website loading speed
- It provides no additional security
If a website's URL begins with "https://," it indicates that the connection is secured with SSL/TLS encryption. This encryption ensures that data transmitted between the client and the server is encrypted, making it more secure and protecting against eavesdropping and data tampering.