单项选择题Which configuration would make an IP SLA probe use a precedence value of 3?()

A.ip sla 1  icmp-echo 1.1.1.1 tos 12
B.ip sla 1  icmp-echo 1.1.1.1 tos 96
C.ip sla 1  icmp-echo 1.1.1.1 precedence 3
D.ip sla 1  icmp-echo 1.1.1.1 dscp 12


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1.单项选择题On a router that is configured with multiple IP SLA probes, which command can be used to manage the CPU load that was created by the periodic probing?()

A.ip sla monitor low-memory
B.ip sla group schedule
C.ip sla reaction-trigger
D.ip sla enable timestamp

2.单项选择题

Refer to the exhibit. In this network, R1 is configured not to perform autosummarization within EIGRP. What routes will R3 learn from R2 through EIGRP? ()

A. 172.30.1.0/24 and 10.1.2.0/24;EIGRP only performs autosummarization at the edge between two major networks.
B. 172.30.0.0/16 and 10.1.2.0/24;R2 will perform autosummarization although R1 will not.
C. Since R2 is configured without autosummarization, it will not propagate the 172.30.1.0/24 route.
D. 172.30.0.0/8 and 10.0.0.0/8.

5.单项选择题Two routers configured to run BGP have been connected to a firewall, one on the inside interface and one on the outside interface. BGP has been configured so the two routers should peer, including the correct BGP session endpoint addresses and the correct BGP session hop-count limit (EBGP multihop). What is a good first test to see if BGP will work across the firewall? ()

A. Attempt to TELNET from the router connected to the inside of the firewall to the router connected to the outside of the firewall. If telnet works, BGP will work, since telnet and BGP both use TCP to transport data.
B. Ping from the router connected to the inside interface of the firewall to the router connected to the outside interface of the firewall. If you can ping between them, BGP should work, since BGP uses IP to transport packets.
C. There is no way to make BGP work across a firewall without special configuration, so there is no simple test that will show you if BGP will work or not, other than trying to start the peering session.
D. There is no way to make BGP work across a firewall.

7.单项选择题While deploying a new switch, you accidently connect ports 3/12 and 3/18 together, creating a loop. STP detected it and placed port 3/18 in blocking mode. Why did STP not place port 3/12 in blocking mode instead? ()

A. Port 3/12 was already up and forwarding before the loop was created.
B. Port priority is based on lowest priority and lowest port number.
C. You connected the wire on port 3/18 last.
D. None of the above, it is purely random.

8.单项选择题After applying a new ACL on a device, its CPU utilization rose significantly and many messages startingwith "%SEC-6-IPACCESSLOG" appeared on the Syslog server.What can be done to resolve this situation?()

A.Increase memory allocation for ACLs.
B.Remove all entries from the ACL and use a single permit ip any any statement.
C.Remove the log keyword from each ACL entry.
D.Reboot the device after the ACL has been applied.

10.单项选择题Which feature would prevent guest users from gaining network access by unplugging an IP phone andconnecting a laptop computer?()

A.IPSec VPN
B.SSL VPN
C.port security
D.port security with statically configured MAC addresses
E.private VLANs

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