fixed header size
smaller header size
fewer header fields
variable header size
第1题：
A. fixed header size
B. smaller header size
C. fewer header fields
D. variable header size
第2题：
A. It fragments and encapsulates all packets in a fragmentation header.
B. Packets smaller than the fragmentation size are interleaved between the fragments of the larger packets.
C. Packets larger than the fragmentation size are always fragmented, and cannot be interleaved, even if the traffic is voice traffic.
D. It fragments and encapsulates packets that are longer than a configured size, but does not encapsulate smaller packets inside a fragmentation header.
第3题：
A. If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, it will
B. If the destination IP address in the outer IP header of ESP does not match the IP address of the ingress interface, it will
C. If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, based packet.
D. If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, based of inner header, it will decrypt the packet.
第4题：
Which statement is true about IP telephony calls？（）
第5题：
Which two are valid fields in an IPv6 header?（）
第6题：
A. An IPv6 address is 128 bits long.
B. An IPv6 header contains the header checksum field.
C. An IPv6 header is 20 bits long.
D. An IPv6 header contains the next header field.
E. IPv6 route rs send RA messages.
F. An IPv6 header contains the protocol field.
第7题：
What are disadvantages of Network Address Translation Transparency?（）
第8题：
A. Hop Limit
B. Next Header
C. Fragment Offset
D. Header Checksum
第9题：
Which process plays a major role in the creation of the CEF adjacency table？ （）
第10题：
What are two reasons for packet loss on a VoIP connection？（）