单项选择题

Which of the following statements is true about a route……

Which of the following statements is true about a router's eBGP peers that is not also true about that same router's iBGP peers?（）

A. The eBGP peer neighborship uses TCP
B. The eBGP peer uses port 180 (default)
C. The eBGP peer uses the same ASN as the local router
D. The eBGP peer updates its AS_Path PA before sending updates to this router

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多项选择题Which of the following are most likely to be used as an ASN by a company that has a registered public 16 -bit ASN?（）

A. 1
B. 65,000
C. 64,000
D. 64,550

单项选择题Router R1, in ASN 11, learns a BGP route from BGP peer R22 in ASN 22. R1 and then uses BGP to advertise the route to R2, also in ASN 11. What ASNs would you see in the BGP table on R2 for this route?（）

A. 22
B. 11
C. 1
D. None

单项选择题Class C network 200.1.1.0 24 was allocated to an ISP that operated primarily in AsiA.That ISP then assigned this entire Class C network to one of its Asian customers. Network 200.1.2.0 24 has yet to be assigned to any ISP. Which of the following is most likely to be true?（）

A. 200.1.2.0/24 could be assigned to any registrar or ISP in the worlD
B. 200.1.2.0/24 will be assigned in the same g eography (Asia) as 200.1.1.0/24
C. 200.1.2.0/24 cannot be assigned as public address spacE
D. Routers inside North American ISPs increase their routing table size by 1 as a result of the customer with 200.1.1.0/24 connecting to the Internet

多项选择题Which of the following are considered private IPv4 addresses?（）

A. 192.16.1.1
B. 172.35.1.1
C. 225.0.0.1
D. 127.0.0.1
E. 10.1.1.1

单项选择题The following output occurs on Router R1. IP SLA operation 1 uses an ICMP echo operation type, with default frequency of 60 seconds. The operation pings from address 1.1.1.1 to address 2.2.2.2. Which of the following answers is true reg arding IP SLA and object tracking on R1?（） R1# show track Track 2 IP SLA 1 state State is Up 3 changes, last change 00:00:03 Delay up 45 secs, down 55 secs Latest operation return code: OK Latest RTT (millisecs) 6 Tracked by: STATIC - IP - ROUTING 0

A. The tracking return code fails after the SLA operation results in an ICMP echo failure three times.
B. The tracking return code fails after the SLA operation results in an ICMP echo failure one time.
C. After the tracking object fails, the tracking o bject moves back to an up state 45 seconds later in all cases.
D. After moving to a down state, the tracking object moves back to an OK state 45 seconds after the SLA operation moves to an OK state.