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.
What differentiates a MAC address from an IP address in terms of their roles in network communication?
- IP addresses are only used in wired networks.
- MAC addresses are longer than IP addresses.
- MAC addresses are physical, data-link layer addresses, while IP addresses are logical, network layer addresses.
- MAC addresses are used for routing, while IP addresses are used for addressing.
MAC addresses are physical addresses assigned to Network Interface Cards (NICs) and are used at the data-link layer for local communication within a network. IP addresses, on the other hand, are logical addresses used for routing data across networks at the network layer.
A newly established smart city is planning to connect all its utilities and infrastructure. The city council wants a medium that provides high bandwidth, is resistant to external damages, and ensures data security. Which transmission medium would best serve their needs?
- Fiber Optic Cable
- Microwave Transmission
- Satellite Communication
- Twisted Pair Cable
Fiber Optic Cable is the best choice for a smart city. It offers high bandwidth, is resistant to external damages, and provides data security, making it suitable for connecting various utilities and infrastructure securely.
In a real-time online gaming environment, quick data transmission and receipt of acknowledgments are crucial. Which flow control mechanism might be better suited for such a scenario?
- ARP
- ICMP
- TCP
- UDP
UDP (User Datagram Protocol) is better suited for real-time online gaming because it offers faster data transmission and doesn't have the acknowledgment and retransmission mechanisms of TCP, which can introduce latency.
A network administrator is troubleshooting connectivity issues on a computer. While the IP address seems to change when moving to different networks, one address remains consistent. Which address is the administrator observing?
- Dynamic IP Address
- MAC Address
- Static IP Address
- Subnet Mask
The consistent address that remains the same as a device moves across different networks is the MAC address (Media Access Control address). This is a unique hardware address assigned to the network interface card (NIC) of a device.
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.