單項選擇題Customer X has a hub-and-spoke Frame Relay network, with a central office and two branch offices (RemoteA and RemoteB). Each location has only one physical link to the Frame Relay cloud and RemoteB has a router that is not a Cisco router. Since the installation, there is no connectivity between RemoteB and the central office. What is a possible solution to this issue? ()

A. Because Frame Relay IETF encapsulation is only configurable at interface level, you must use IETF encapsulation on all routers.
B. This is not a possible scenario. A dedicated Frame Relay link to RemoteB is mandatory at the central office.
C. The router at RemoteB must be replaced by a Cisco router.
D. Use Frame Relay IETF encapsulation on a per-VC basis on the central office router.
E. There is a problem in the Frame Relay cloud, because Cisco routers are compatible with IETF Frame Relay.


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1.單項選擇題For a router connected to two ISPs for redundancy, using IPSLA and static routing, how would youconfigure uRPF on the uplink interface?()

A.ip verify unicast source reachable-via any
B.ip verify unicast reverse-path
C.ip verify unicast reverse-path loose
D.ip verify unicast reverse-path strict

2.單項選擇題Before inserting a new switch in the network, the network administrator checks that the VTP domain name is correct, the VTP mode is set to server, and revision is lower than the switches in the network. The administrator then configures interfaces and trunks, erases existing VLANs, and connects the switch to the network. Following that procedure, there is no connectivity in the network. What is a possible cause of this problem? ()

A. Because the configuration revision of the new switches is lower than the rest of the network,it can change the VLAN database of the other switches.
B. As a VTP server, the new switch deleted all VLANs of the network.
C. Erasing VLANs increases the VTP configuration revision.
D. Since the configuration revision of the network is higher than the new switch,the VLAN database was automatically synchronized.

3.多項選擇題

Refer to the exhibit. Users from the Engineering VLAN complain that every time Business VLAN users have a network connectivity issue, the Engineering VLAN users usually have problems experiencing slow response or network connectivity problems. After troubleshooting, an unauthorized switch 2 was found. This unauthorized switch has been a regular problem, assuming the root bridge function under the spanning-tree domain and causing the 
Engineering VLAN to be unstable. Which three of these actions could be suggested to fix the problem?()

A. Upgrade Spanning Tree Protocol to Rapid Spanning Tree Protocol.
B. Change Business VLAN PCs to switch 1 and switch 4.
C. Force the root bridge to be switch 2, instead.
D. Adjust spanning-tree timers (max-age and forward-delay).
E. Shut down all unused ports.
F. Use MSTP to separate the Engineering VLAN from the Business VLAN to optimize spanning-tree convergence time within each VLAN

4.單項選擇題What is true about IP Source Guard with port security?()

A.Binding should be manually configured.
B.It is not supported if IEEE 802.1x port-based authentication is enabled.
C.The DHCP server must support option 82, or the client is not assigned an IP address.
D.It filters based on source IP address only.

5.單項選擇題

Refer to exhibits 1 and 2. In exhibit 1, all users on the LAN segment use router A as the active HSRP router. Router B is the standby router for the HSRP. In exhibit 2, the network management team reported that there is no utilization on the WAN link B. To solve this problem, you decide to change the logical topology of your LAN, but you are not sure about what changes must be made. You must manage HSRP or change it to another protocol in order to provide the most scalable design, automatic redundancy, and load balancing. Which one of these actions would be the best choice? ()

A. Use MHSRP, with three users using router A as the default gateway and three users using router B as the default gateway.
B. Keep HSRP and activate PBR to redirect half of the traffic to the other WAN link.
C. Use the backup interface on the WAN link B to provide load balancing for all users.
D. Use GLBP instead, because it provides you with up to three MAC addresses for the same default gateway virtual IP address.
E. Use GLBP instead, because it provides you with up to four MAC addresses for the same default gateway virtual IP address.

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