A.LSP fragment extension is also valid for Hello PDUs.

B.LSP fragment extension enables an IS-IS router to generate multiple LSP fragments to carry more 15-15 information.

C.An IS-IS router can generate a maximum of 1024 LSP fragments.

D.LSP fragment extension is implemented by adding virtual systems, with a maximum of 1000 virtual systems supported.

A.The receiver is required to acknowledge the data packets transmitted by the sender

B.The size of the sliding window can only increase or stay the same

C.The initial window offer is advertised by the sender

D.The sender need not transmit a full window's worth of data

E.If the retransmission timer expires without the sender receiving an ACK message, the receiver retransmits the packet to the sender.

F.It allows the transmission of multiple frames before waiting for an acknowledgment

A.6to4

B.Dual Stack

C.ISATAP

D.NAT64

A.The PIM-SM router with the smallest IP address is elected as the DR.

B.The PIM-SM router with the longest interface mask is elected as the DR.

C.The PIM-SM router with the lowest DR priority is elected as the DR.

D.DR priorities of the PIM-SM routers are compared first. If their DR priorities are the same, their interface IP addresses are then compared.

A.VXLAN Layer 3 gateways can be classified into centralized and distributed gateways.

B.VXLAN Layer 3 gateways allow inter-subnet VXLAN communication and access to external networks.

C.VXLAN Layer 2 gateways are bound to VPN instances.

D.VXLAN Layer 2 gateways enable tenants to access VXLAN and are used for communication between subnets on the same VXLAN.