The TTL field was originally designed to hold a time stamp, which was decremented by each visited router. The datagram was ( ) when the value became zero. However, for this scheme, all the machines must have synchronized clocks and must know how long it t

题目
The TTL field was originally designed to hold a time stamp, which was decremented by each visited router. The datagram was ( ) when the value became zero. However, for this scheme, all the machines must have synchronized clocks and must know how long it takes for a datagram to go from one machine to another. Today, this field is used mostly to control the ( ) number of hops (routers) visited by the datagram. When a source host sends the datagram, it (请作答此空) a number in this field. Each router that processes the datagram decrements this number by 1. If this value, after being decremented, is zero, the router discards the datagram.This field is needed because routing tables in the Internet can become corrupted.A datagram may travel between two or more routers for a long time without ever getting delivered to the ( ).This field limits the ( ) of a datagram.

A.controls
B.transmits
C.stores
D.receives
相似考题

1.A BGP connection is being established.What happens if the local router and the peer router do NOT have the same hold－time value configured?()A. The BGP session does not establish.B. The hold time is assumed to be infinite.C. The larger of the two hold-time values is used.D. The smaller of the two hold-time values is used.

2.The TTL field was originally designed to hold a time stamp, which was decremented by each visited router. The datagram was ( ) when the value became zero. However, for this scheme, all the machines must have synchronized clocks and must know how long it takes for a datagram to go from one machine to another. Today, this field is used mostly to control the ( ) number of hops (routers) visited by the datagram. When a source host sends the datagram, it ( ) a number in this field. Each router that processes the datagram decrements this number by 1. If this value, after being decremented, is zero, the router discards the datagram.This field is needed because routing tables in the Internet can become corrupted.A datagram may travel between two or more routers for a long time without ever getting delivered to the (请作答此空).This field limits the ( ) of a datagram.A.switch B.router C.source host D.destination host

3.The TTL field was originally designed to hold a time stamp, which was decremented by each visited router. The datagram was ( ) when the value became zero. However, for this scheme, all the machines must have synchronized clocks and must know how long it takes for a datagram to go from one machine to another. Today, this field is used mostly to control the ( ) number of hops (routers) visited by the datagram. When a source host sends the datagram, it ( ) a number in this field. Each router that processes the datagram decrements this number by 1. If this value, after being decremented, is zero, the router discards the datagram.This field is needed because routing tables in the Internet can become corrupted.A datagram may travel between two or more routers for a long time without ever getting delivered to the ( ).This field limits the (请作答此空) of a datagram.A.lifetime B.moving time C.receiving time D.transmitting time

4.When debugging a routing problem, the time－to－live (TTL) value can be used to determine:()A. Number of routes available.B. Number of router hops.C. Time that an advertised route is valid.D. Time to make a round trip.

更多“The TTL field was originally designed to hold a time stamp, which was decremented by each visited router. The datagram was ( ) when the value became zero. However, for this scheme, all the machines m”相关问题

  • 第1题：

    When Albert Reynolds became Prime Minister in 1992,both Ireland and Britain agreed to hold regular meetings.（）

    Ato deal with the IRA

    Bto make preparations for a united Ireland

    Cto seek an end to the violence in Northern Ireland

    Dto improve relations with each other


    C
    略

  • 第2题：

    To provide quality of service （QoS） for voice traffic in an IEEE 802.1 q network， which class of service （CoS） value should be used in the 3-bit， user priority bits （PRI） field？ （）

    • A、The PRI field should contain the Cos value of 010
    • B、The PRI field should contain the Cos value of 011
    • C、The PRI field should contain the Cos value of 100
    • D、The PRI field should contain the Cos value of 101
    • E、The PRI field should contain the Cos value of 110
    • F、The PRI field should contain the CoS value of 111

    正确答案:D

  • 第3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4题：

    When debugging a routing problem, the time-to-live (TTL) value can be used to determine:（）

    • A、Number of routes available.
    • B、Number of router hops.
    • C、Time that an advertised route is valid.
    • D、Time to make a round trip.

    正确答案:B

  • 第5题：

    You are building two forms. Each form has a button and a non-base table field. When the button is pressed, a complicated calculation is executed. The calculation is the same for both forms. The calculation code does not query or change the data in the database. When the calculation completes, it returns a single value to the non-base table field. To optimize performance and maintainability, which PL/SQL structure should be used? （）

    • A、A trigger in each form. 
    • B、A subprogram in each form. 
    • C、A stored subprogram in the database. 
    • D、A subprogram in a library that is attached to each form.

    正确答案:D

  • 第6题：

    单选题
    On January 1, 1993, Geraldine purchased a rare stamp for $300. The value of the rare stamp increased by 15 percent each year. If Geraldine decided to sell the stamp on January of the first year in which its value had at least doubled since she purchased it, then in which year did Geraldine sell the stamp?
    A

    1996

    B

    1997

    C

    1998

    D

    1999

    E

    2000


    正确答案： C
    解析：
    假设过了y年，邮票的价值为S(y)＝300×(1.15)y，经计算y=4时，S(y)<600，y=5时，邮票的价格大约为603美元，是原来的价格的两倍，所以1998年，Geraldine将邮票售出。

  • 第7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8题：

    单选题
    when robert created a response form. he set the "formulas inherit values from selected document" option on the form properties, the field name on the review form is the same as the field name on the inheriting form, however the form does not inherit any data ,why ?（）
    A

    he failed to specify the form type  

    B

    the inheriting form is not a response form  

    C

    he specified the same field names on both forms 

    D

    he failed to provide inheritance formulas for each field 


    正确答案： C
    解析： 暂无解析

  • 第9题：

    单选题
    When Albert Reynolds became Prime Minister in 1992,both Ireland and Britain agreed to hold regular meetings.（）
    A

    to deal with the IRA

    B

    to make preparations for a united Ireland

    C

    to seek an end to the violence in Northern Ireland

    D

    to improve relations with each other


    正确答案： B
    解析： 暂无解析

  • 第10题：

    单选题
    You are building two forms. Each form has a button and a non-base table field. When the button is pressed, a complicated calculation is executed. The calculation is the same for both forms. The calculation code does not query or change the data in the database. When the calculation completes, it returns a single value to the non-base table field. To optimize performance and maintainability, which PL/SQL structure should be used? （）
    A

    A trigger in each form. 

    B

    A subprogram in each form. 

    C

    A stored subprogram in the database. 

    D

    A subprogram in a library that is attached to each form.


    正确答案： B
    解析： 暂无解析

  • 第11题：

    单选题
    To provide quality of service （QoS） for voice traffic in an IEEE 802.1 q network， which class of service （CoS） value should be used in the 3-bit， user priority bits （PRI） field？ （）
    A

    The PRI field should contain the Cos value of 010

    B

    The PRI field should contain the Cos value of 011

    C

    The PRI field should contain the Cos value of 100

    D

    The PRI field should contain the Cos value of 101

    E

    The PRI field should contain the Cos value of 110

    F

    The PRI field should contain the CoS value of 111


    正确答案： F
    解析： 暂无解析

  • 第12题：

    单选题
    For many years marine centrifuges were designed for （） operation, that is the machines were run for a period during which solids accumulated in the bowlThe machine was stopped when the accumulated solids began to impair its performance.
    A

    purifying

    B

    batch

    C

    long period

    D

    temporary


    正确答案： B
    解析： 暂无解析

  • 第13题：

    When Albert Reynolds became Prime Minister in 1992,both Ireland and Britain agreed to hold regular meetings.（）

    • A、to deal with the IRA
    • B、to make preparations for a united Ireland
    • C、to seek an end to the violence in Northern Ireland
    • D、to improve relations with each other

    正确答案:C

  • 第14题：

    Which statements concerning the value of a member variable are true， when no explicit assignments have been made？（）  

    • A、The value of an int is undetermined.
    • B、The value of all numeric types is zero.
    • C、The compiler may issue an error if the variable is used before it is initialized.
    • D、The value of a String variable is "" （empty string）.
    • E、The value of all object variables is null.

    正确答案:B,E

  • 第15题：

    A user states that the wireless on their laptop was working when they where at home, however,now in the office no wireless connection can be made. Which of the following should the technician check FIRST?（）

    • A、If the wireless is enabled
    • B、If the laptop is connected to the correct gateway
    • C、If the SSID is enabled
    • D、If the DHCP address scheme is correct

    正确答案:A

  • 第16题：

    when robert created a response form. he set the "formulas inherit values from selected document" option on the form properties, the field name on the review form is the same as the field name on the inheriting form, however the form does not inherit any data ,why ?（）

    • A、he failed to specify the form type  
    • B、the inheriting form is not a response form  
    • C、he specified the same field names on both forms 
    • D、he failed to provide inheritance formulas for each field 

    正确答案:D

  • 第17题：

    Which property of the ListView class is used to get/set the name of the data field whose value exclusively identifes every data row of a ListView when the ClientIDMode property is set to Predictable？（）

    • A、LoadViewStateByID
    • B、UniqueID
    • C、ClientIDMode
    • D、ClientIDRowSuffix

    正确答案:D

  • 第18题：

    多选题
    Which statements concerning the value of a member variable are true， when no explicit assignments have been made？（）
    A

    The value of an int is undetermined.

    B

    The value of all numeric types is zero.

    C

    The compiler may issue an error if the variable is used before it is initialized.

    D

    The value of a String variable is  （empty string）.

    E

    The value of all object variables is null.


    正确答案： B,E
    解析： 暂无解析

  • 第19题：

    单选题
    You are an enterprise administrator for Cer-tech .com. All the servers on the network run Windows Server2008. The network consists of a server called Server01 that runs Microsoft Hyper-V and hosts three virtualmachines. To fulfill a network requirement， you need to configure all of the virtual machines to connect toeach other. However， the company policy states that the virtual machines must not connect to the companynetwork. Which of the following options would you choose to ensure that all the virtual machines connect to eachother and you meet the company policy also？（）
    A

    Enable the Enable virtual LAN identification option for each virtual machine

    B

    Enable the Enable virtual LAN identification option for each virtual machine and then set the connection to Host for the network interface card

    C

    Set the Connection to None for the network interface card

    D

    Select the Not connected option for each virtual machine.


    正确答案： C
    解析： 暂无解析

  • 第20题：

    单选题
    View the Exhibit to examine the metrics with a threshold.Which statement is true regarding the Number of Transactions (per second) metric?（）
    A

    Oracle uses statistical relevance to determine when an adaptive threshold has been breached for the metric.

    B

    The statistics for the metric values observed over the baseline time period are not examined to determine threshold values.

    C

    Oracle determines when an adaptive threshold has been breached based on the maximum value captured by the baseline.

    D

    The total concurrent number of threshold violations, which must occur before an alert is raised for the metric, has been set to zero.


    正确答案： D
    解析： 暂无解析

  • 第21题：

    单选题
    When debugging a routing problem, the time-to-live (TTL) value can be used to determine:（）
    A

    Number of routes available.

    B

    Number of router hops.

    C

    Time that an advertised route is valid.

    D

    Time to make a round trip.


    正确答案： C
    解析： 暂无解析

  • 第22题：

    单选题
    A BGP connection is being established.What happens if the local router and the peer router do NOT have the same hold-time value configured?（）
    A

    The BGP session does not establish.

    B

    The hold time is assumed to be infinite.

    C

    The larger of the two hold-time values is used.

    D

    The smaller of the two hold-time values is used.


    正确答案： B
    解析： 暂无解析

  • 第23题：

    单选题
    When comparing the air with 50% of relative humidity with the air with 100% of relative humidity, which one will hold more water?（）
    A

    the former

    B

    the latter

    C

    not for sure

    D

    same each other


    正确答案： C
    解析： 暂无解析

相关内容