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Given the following two AS path regular expressions: "65000+

题目
单选题
Given the following two AS path regular expressions: "65000+ (65001|65002)" "65000(65001|65002){0,}" Which AS path matches both regular expressions?（）
A

65000 65001 65002

B

65000 65002

C

65001 65000

D

65001 65002

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相似问题和答案

第1题：

Given the following LSP configuration, which statement is true?（）label-switched-path lsp-xyz { to 10.200.1.1; primary path1; secondary path2; secondary path3; no-cspf; } path path1 { 10.200.10.1 strict; } path path2 { 10.200.20.1 strict; } path path3 { 10.200.30.1 loose; }

A. The router will use path1 when it is available and stable.

B. The router will use path3 when it is available and stable.

C. The router will attempt to establish path2 only when path1 and path3 are down.

D. The router will attempt to establish path1 only when path2 and path3 are down.


参考答案：A

第2题：

Router R1 learns two routes with BGP for prefix 200.1.0.0/16. Comparing the two routes, route 1 has a shorter AS_Path Length, smaller MED, the same Weight, and smaller Local PreferencE. Which of the following is true about Router R1's choice of best path for this prefix?（）

  • A、Route 1 is the best route.
  • B、Route 2 is the best route.
  • C、The routes tie as best, but one will be picked to be placed in the routing table based on tiebreakers .
  • D、Neither route is considered best.

正确答案:B

第3题：

Given the regular expression: 64900 . (65400－65410) Which AS Path matches the given regularexpression?()

A. 64900 65000 65500

B. 64900 65402 65409

C. 64900 65000 65300 65410

D. 64900 65402 65405 65409


参考答案：B

第4题：

Which statement is false？（） 

  • A、 custom URL categories cannot contain IP addresses
  • B、 custom URL categories cannot override predefined URL categories
  • C、 custom URL categories can contain domain names
  • D、 custom URL categories can use regular expressions

正确答案:A

第5题：

Why does IS-IS use the SPF algorithm?（）

  • A、to determine the pseudonode ID
  • B、to determine the next hop to a given destination
  • C、to determine the complete path to a given destination
  • D、to determine the number of routers present in a given area

正确答案:B

第6题：

GiventhetwoASpathregularexpressions:"65000＋(65001|65002)""65000＋(65001|65002){0,}"WhichASpathmatchesbothexpressions?()

A.650006500165002

B.6500065002

C.6500165000

D.6500165002


参考答案：B

第7题：

Which two are characteristics of link-state routing protocols?（） (Choose two.)

  • A、Routers choose a best path for a destination based on the SPF algorithm.
  • B、All routers in a given area or level build a consistent database describing the network's topology.
  • C、Routers choose the best path for a destination based on the interface on which they received the link stateadvertisement with the lowest cost.
  • D、All routers in a given area or level forward link state advertisements between interfaces in the same area or level, adding their metric to the link state advertisement's cost information when they forward it.

正确答案:A,B

第8题：

Given the following two AS path regular expressions: "65000＋ (65001|65002)" "65000(65001|65002){0,}" Which AS path matches both regular expressions?()

A. 65000 65001 65002

B. 65000 65002

C. 65001 65000

D. 65001 65002


参考答案：B

第9题：

Given that Thing is a class， how many objects and reference variables are created by the following code？（）   Thing item， stuff；   item = new Thing（）；   Thing entity = new Thing（）；

  • A、One object is created
  • B、Two objects are created
  • C、Three objects are created
  • D、One reference variable is created
  • E、Two reference variables are created
  • F、Three reference variables are created.

正确答案:B,F

第10题：

Router R1 learns two routes with BGP for prefix 200.1.0.0/16. Comparing the two routes, route 1 has a longer AS_Path Length, bigger MED, bigger Weight, and smaller Loca l PreferencE. Which of the following is true about Router R1's choice of best path for this prefix?（）

  • A、Route 1 is the best route.
  • B、Route 2 is the best route.
  • C、The routes tie as best, but one will be picked to be placed in the routing table based on tiebreakers.
  • D、Neither route is considered best.

正确答案:A

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