A company network administrator wants to be able to remotely manage branch network devices. Which of the following protocols will be used?

• A.RSTP
• B.CIDR
• C.Telnet
• D.VLSM

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Which of the following descriptions are correct about IPv6? (Multiple Choice)

• A.When an IPv6 packet has multiple extension headers, the extension header can appear randomly.
• B.IPv6 address length is 64 bits
• C.When an IPv6 packet has multiple extension headers, the extension header must appear in an orderly manner
• D.IPv6 address length is 128 bits.

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Which of the following statements about the TTL field in the IP packet header is correct?

• A.Whenever a IP packet passes through a router, its TTL value will be increased by 1.
• B.TTL defines the number of packets that the source host can send.
• C.Whenever a IP packet passes through a router, its TTL value is decremented by 1.
• D.TTL defines the time interval at which the source host can send packets.

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Two authentication domains "Area 1" and "Area 2" are configured on a router that serves as the authentication server. If the user authenticates with the correct username "huawei" and password "hello", which authentication domain will the user assigned to?

• A.Authentication domain "Area1"
• B.Authentication domain "Area2"
• C.Authentication domain "default domain"
• D.Authentication domain "default_admin domain"

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Which statement is correct about the function of the network layer in the OSI reference model?

• A.Combine the bits into bytes, combine the bytes into frames, use the link layer address (the Ethernet uses the MAC address) to access the medium, and perform error detection.
• B.Transmit bitstreams between devices, specifying levels, speed, and cable pins
• C.Provide connection-oriented or non-connection-oriented data transfer and error detection before retransmission
• D.Provide a logical address for the router to determine the path
• E.The closest layer to the user in the OSI reference model, providing network services for applications

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