单选题Why is IPv6 packet processing more effective than IPv4 packet processing?（）A fixed header sizeB smaller header sizeC fewer header fieldsD variable header size

题目
单选题
Why is IPv6 packet processing more effective than IPv4 packet processing?（）
A

fixed header size

B

smaller header size

C

fewer header fields

D

variable header size

相似考题

1.When an SRX series device receives an ESP packet, what happens?()A. If the destination address of the outer IP header of the ESP packet matches the IP address of the ingress interface, it willB. If the destination IP address in the outer IP header of ESP does not match the IP address of the ingress interface, it willC. 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.

2.Why is IPv6 packet processing more effective than IPv4 packet processing?()A. fixed header sizeB. smaller header sizeC. fewer header fieldsD. variable header size

3.Which three are characteristics of IPv6?()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.

4.Which two are valid fields in an IPv6 header?()A. Hop LimitB. Next HeaderC. Fragment OffsetD. Header Checksum

更多“单选题Why is IPv6 packet processing more effective than IPv4 packet processing?（）A fixed header sizeB smaller header sizeC fewer header fieldsD variable header size”相关问题

  • 第1题：

    Which two statements are true about MLP interleaving? ()

    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.


    参考答案：B, D

  • 第2题：

    Which two are valid fields in an IPv6 header?（）

    • A、Hop Limit
    • B、Next Header
    • C、Fragment Offset
    • D、Header Checksum

    正确答案:A,B

  • 第3题：

    Which statement is true about IP telephony calls？（）

    • A、 A Voice over IP （VoIP） packet consists of the voice payload， IP header， TCP header， RTP header， and  Layer 2 link header.
    • B、 The voice carrier stream uses H323 to set up， maintain， and tear down call endpoints.
    • C、 Call control signaling uses Real-Time Transport Protocol （RTP） packets that contain actual voice  samples.
    • D、 The sum of bandwidth necessary for each major application， including voice， video， and data， should not exceed 75 percent of the total available bandwidth for each link.

    正确答案:D

  • 第4题：

    Which two statements about an interface configured with the asr-group command are correct?（）

    • A、The FWSM supports up to 16 asymmetric routing groups.
    • B、If a matching packet is not found, the packet is dropped.
    • C、Asymetric routing of return traffic is enabled.
    • D、If a matching packet is found, the Layer 3 header is rewritten.
    • E、If a matching packet is found, the Layer 3 header is rewritten and the packet is forwarded to the default gateway.

    正确答案:B,C

  • 第5题：

    What are the DSL-specific factors that require additional bandwidth when supporting Voice-over-IP over an IPSec VPN?（）

    • A、A voice packet is sent via multiple fixed-length cells; a portion of the last cell is padding, requiring more bandwidth.
    • B、ADSL typically uses PPPoE encapsulation, which adds additional overhead to each voice packet.
    • C、A voice packet is sent via multiple fixed-length cells; each cell has about 10% Layer-2 header overhead. 
    • D、IPSec requires additional overhead for the header and hash. 
    • E、ADSL carrier band requires additional bits to be carried over the wire to the DSL Access Concentrator.

    正确答案:A,B,C

  • 第6题：

    Which of the following is true about the MPLS header and its EXP field size？（）

    • A、The MPLS header is 2 bytes，and the EXP field is 3 bits long.
    • B、The MPLS header is 1 byte，and the EXP field is 3 bits long.
    • C、The MPLS header is 4 bytes，and the EXP field is 3 bits long.
    • D、The MPLS header is 3 bytes，and the EXP field is 3 bits long.

    正确答案:C

  • 第7题：

    When an SRX series device receives an ESP packet, what happens?（）

    • 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.

    正确答案:C

  • 第8题：

    多选题
    Which three are characteristics of IPv6?（）
    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.


    正确答案： A,C
    解析： 暂无解析

  • 第9题：

    单选题
    Which statement is true about IP telephony calls？（）
    A

     A Voice over IP （VoIP） packet consists of the voice payload， IP header， TCP header， RTP header， and  Layer 2 link header.

    B

     The voice carrier stream uses H323 to set up， maintain， and tear down call endpoints.

    C

     Call control signaling uses Real-Time Transport Protocol （RTP） packets that contain actual voice  samples.

    D

     The sum of bandwidth necessary for each major application， including voice， video， and data， should not exceed 75 percent of the total available bandwidth for each link.


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    Where is the MPLS label imposed？（）
    A

    after the Layer 3 header and before the Layer 2 payload

    B

    after the Layer 3 header and before the Layer 4 payload

    C

    after the Layer 2 header and before the Layer 1 payload

    D

    after the Layer 1 header and before the Layer 2 payload

    E

    after the Layer 2 header and before the Layer 3 payload


    正确答案： A
    解析： 暂无解析

  • 第11题：

    单选题
    Which of the following is true about the MPLS header and its EXP field size？（）
    A

    The MPLS header is 2 bytes，and the EXP field is 3 bits long.

    B

    The MPLS header is 1 byte，and the EXP field is 3 bits long.

    C

    The MPLS header is 4 bytes，and the EXP field is 3 bits long.

    D

    The MPLS header is 3 bytes，and the EXP field is 3 bits long.


    正确答案： B
    解析： 暂无解析

  • 第12题：

    多选题
    What are disadvantages of Network Address Translation Transparency?（）
    A

    There is no disadvantage.

    B

    It will add 16 bytes per packet of overhead(8 bytes UDP header, and 8 bytes of NON-IKE Marker).

    C

    It will add 36 bytes per packet of overhead (20 bytes of IP header, 8 bytes of UDP header, 8 bytes of NON-IKE Marker).

    D

    It will require that both crypto peers support this feature in the IOS version. Both crypto peers must also have this feature enabled.


    正确答案： D,B
    解析： 暂无解析

  • 第13题：

    What are disadvantages of Network Address Translation Transparency?（）

    • A、There is no disadvantage.
    • B、It will add 16 bytes per packet of overhead(8 bytes UDP header, and 8 bytes of NON-IKE Marker).
    • C、It will add 36 bytes per packet of overhead (20 bytes of IP header, 8 bytes of UDP header, 8 bytes of NON-IKE Marker).
    • D、It will require that both crypto peers support this feature in the IOS version. Both crypto peers must also have this feature enabled.

    正确答案:B,D

  • 第14题：

    Which process plays a major role in the creation of the CEF adjacency table？ （）

    • A、Address Resolution Protocol （ARP）
    • B、PDU header rewrite
    • C、NetFlow switching
    • D、hello packet exchange

    正确答案:A

  • 第15题：

    What are two reasons for packet loss on a VoIP connection？（）

    • A、serialization delay
    • B、overrun
    • C、full buffers and queues
    • D、propagation delay
    • E、shaping delay
    • F、TCP header errors

    正确答案:B,C

  • 第16题：

    Which statement correctly describes the disabling of IP TTL propagation in an MPLS network？（）

    • A、The TTL field from the IP packet is copied into the TTL field of the MPLS label header at the ingress edge LSR
    • B、TTL propagation cannot be disabled in an MPLS domain
    • C、TTL propagation is only disabled on the ingress edge LSR
    • D、The TTL field of the MPLS label header is set to 255
    • E、The TTL field of the IP packet is set to 0

    正确答案:D

  • 第17题：

    Which three statements are true about TACACS+？（）

    • A、It is a Cisco proprietary protocol.
    • B、It runs on TCP port 59. .
    • C、Authentication and authorization are done at different stages.
    • D、TACACS+ encrypts the entire body of the packet， but leaves a standard TACACS+ header.
    • E、It is an industry standard protocol.
    • F、TACACS+ encrypts both the entire body of the packet and the TACACS+ header.

    正确答案:A,C,D

  • 第18题：

    Why is IPv6 packet processing more effective than IPv4 packet processing?（）

    • A、fixed header size
    • B、smaller header size
    • C、fewer header fields
    • D、variable header size

    正确答案:A

  • 第19题：

    多选题
    What are two reasons for packet loss on a VoIP connection？（）
    A

    serialization delay

    B

    overrun

    C

    full buffers and queues

    D

    propagation delay

    E

    shaping delay

    F

    TCP header errors


    正确答案： B,C
    解析： 暂无解析

  • 第20题：

    单选题
    Which statement correctly describes the disabling of IP TTL propagation in an MPLS network？（）
    A

    The TTL field from the IP packet is copied into the TTL field of the MPLS label header at the ingress edge LSR

    B

    TTL propagation cannot be disabled in an MPLS domain

    C

    TTL propagation is only disabled on the ingress edge LSR

    D

    The TTL field of the MPLS label header is set to 255

    E

    The TTL field of the IP packet is set to 0


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    Which process plays a major role in the creation of the CEF adjacency table？ （）
    A

    Address Resolution Protocol （ARP）

    B

    PDU header rewrite

    C

    NetFlow switching

    D

    hello packet exchange


    正确答案： A
    解析： 暂无解析

  • 第22题：

    单选题
    When an SRX series device receives an ESP packet, what happens?（）
    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.


    正确答案： D
    解析： 暂无解析

  • 第23题：

    多选题
    Which two statements about an interface configured with the asr-group command are correct?（）
    A

    The FWSM supports up to 16 asymmetric routing groups.

    B

    If a matching packet is not found, the packet is dropped.

    C

    Asymetric routing of return traffic is enabled.

    D

    If a matching packet is found, the Layer 3 header is rewritten.

    E

    If a matching packet is found, the Layer 3 header is rewritten and the packet is forwarded to the default gateway.


    正确答案： C,A
    解析： 暂无解析

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