Huawei's HiSecEngine firewalls have a large security database and comprehensive security detection capabilities. How many applications can a Huawei firewall identify at most?
Answer(s): A
With the rapid development of the Internet, DDoS attacks from hackers are dramatically rising in intensity, frequency, and complexity. Huawei anti DDoS solution provides enterprise network with strong capability of anti DDoS to ensure stable and secure environment. Which are the Huawei anti-DDoS solution advantages? (Choose all that apply.)
Answer(s): A,B,C
What are the basic roles of devices in the typical MPLS VPN technical architecture? (Choose all that apply.)
Answer(s): B,D,E
Provider Edge (PE): PE devices are at the edge of the provider's MPLS network and connect to Customer Edge (CE) devices. They play a crucial role in MPLS VPN by implementing VPN configurations and managing the routing between the customer and the provider network.Customer Edge (CE): CE devices are located at the customer's premises and connect to the provider's network via PE devices. These devices are responsible for communicating with the provider's network.Provider (P): P devices are part of the core of the MPLS provider network and are used to forward MPLS packets between PE devices. They do not interact directly with customer devices but provide the backbone for data transmission.
Typical transport layer protocols include TCP and UDP. Which of the following is not a characteristic of TCP?
Answer(s): B
TCP (Transmission Control Protocol) is a connection-oriented protocol, which means it establishes a connection between the sender and receiver before data transmission begins. It provides reliable transmission, ensuring data is delivered accurately and in the correct order, with mechanisms like acknowledgment and retransmission in case of errors. TCP also incorporates flow control and a window mechanism to manage data flow between the sender and receiver, preventing congestion or overwhelming the receiver.
After data arrives at the physical layer, the digital signals are converted into optical, electrical, or electromagnetic wave signals depending on the physical media.
The physical layer of the OSI model is responsible for the transmission and reception of raw bit streams over a physical medium. When data arrives at the physical layer, digital signals are converted into appropriate physical signals such as optical signals (for fiber-optic cables), electrical signals (for twisted pair or coaxial cables), or electromagnetic waves (for wireless communication). These physical signals are then transmitted across the chosen medium to the receiving end.
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