Which of the following statements are NOT true regarding the TCP sliding window? (Multiple Choice)

• A.TCP sliding window allows the transmission of multiple frames before waiting for an acknowledgement.
• B.The size of the sliding window can only increase or stay the same.
• C.The sender need not transmit a full window's worth of data.
• D.The size of initial window is advertised by the sender.
• E.If the retransmission timer expires but the sender has not received the acknowledgement, it will retransmit the unacknowledged data.

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Regarding the cross-domain VPN-OptionB scheme, which of the following description is wrong?

• A.The cross-domain VPN-Option B scheme is not limited by the number of interconnected links between ASBRs.
• B.During the packet forwarding process, exchange the private network LSPs of the VPN on the two ASBRs.
• C.An IP-EBGP neighbor relationship needs to be established between the two ASBRs.
• D.Exchange the outer label of the VPNv4 route between the two ASBRs.

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Which of the following statements about the attributes of the ISIS protocol LSP packet is correct?

• A.Reduce the minimum interval for sending LSPs on an interface to speed up LSP diffusion.
• B.When the link state information increases, the packet length of the SP can be increased, so that each LSP can carry more information.
• C.Configure an intelligent timer generated by the LSP, which can automatically adjust the delay time according to the change frequency of the routing information.
• D.The LSP fast flooding feature first spreads out LSPs smaller than the specified number to speed up the synchronization process of the LSDB.

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Regarding the BGP confederation, which of the following description is wrong?

• A.The confederation divides an AS into several sub-ASs, and the external AS still considers the confederation to be an AS.
• B.The sub-AS number of the confederation is advertised to BGP peers outside the confederation by default.
• C.The sub-AS number in the confederation can use a private AS number. A Huawei NE/AR router can be configured with up to 32 sub-AS numbers.
• D.The confederation can easily detect the routing loop in the AS because EBGP is running between sub-ASs.

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Which of the following statement about the security association SA in IPsec is wrong?

• A.There must be a two-way SA between IPsec peers to establish an IPsec VPN connection.
• B.IPsec only supports the use of symmetric encryption algorithms to encrypt data.
• C.The SA is uniquely identified by a triplet that includes the Security Parameter Index (SP), the source IP address, and the security protocol number used (AH or ESP).
• D.Use display IPsec to view information about encryption algorithms, traffic, and other information used between another IPsec peer.

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