Chapter 8 Quiz 1. Match the Network Simulation Software descriptions to the corresponding benefit Descriptions A. Test software is chapter than a test network. B. Changing device types and topologies is easy. C. Traffic can be observed and packets can be examined. D. Faster to build large networks with software. Benefits 1. Control 2. Flexibility 3. Scalability 4. Low overall cost 2. What three things can be done to simulate a DSL or cable WAN connection in a lab environment? (Choose three.) A. Use 100 Mbps serial links between the routers. B. Use 10 Mbps Ethernet connections between the routers via crossover cable. C. Use 100 Mbps Ethernet links to connect the routers via a straight-through cable. D. Use 10 Mbps Ethernet connections between the routers via a straight-through cable. E. Change static route preference by increasing the administrative distance assigned to the route. F. Use the bandwidth command on the Ethernet links to adjust the routing metric. 3. A ping is sent to address 192.168.50.10 from the Peanut router. Which DLCI will be used to send the ping? Exhibit Three Routers (Jelly, Butter, Peanut) Peanut is connected to Jelly via Serial link (Peanut: S0/0.110 IP: 192.168.50.9/29 DLCI 110, Jelly: S0/0 IP: 192.168.50.19/29 DLCI: 225) Peanut is connected to Butter via Serial link (Peanut: S0/0.220 IP: 192.168.50.18/29 DLCI: 220, Butter: S0/0 IP: 192.168.50.10/29 DLCI: 115) There is a frame Relay cloud between all three Routers A. 110 B. 115 C. 220 D. 225 4. Refer to the exhibit. Given the topology as shown, a network administrator configures a Frame Relay connection to allow each of the routers to communicate with each other. Upon completing the task, the administrator makes a routing change on R2 but notes that the update is only being reflected at R1. How should the network administrator resolve this problem? Exhibit Four Routers (R1, R2, R3, R4) R1 is connected to R2 via Serial link DLCI 201(R1: S0/0 IP: 10.10.10.1, R2: S0/0 IP: 10.10.10.2) R1 is connected to R3 via Serial link DLCI 301(R1: S0/0 IP: 10.10.10.1, R3: S0/0 IP: 10.10.10.3) R1 is connected to R4 via Serial link DLCI 401(R1: S0/0 IP: 10.10.10.1, R3: S0/0 IP: 10.10.10.4) A. Reconfigure the routing protocol on each of the routers. B. Configure sub-interfaces on R1 instead of using a single interface. C. Routing protocols cannot update across a Frame Relay connection. D. Shut down and restart the S0/0 interface on R1 as this will trigger a routing update 5. A network administrator has configured a Frame Relay connection between the corporate network and a local Internet Service Provider (ISP) to supply the network database servers with a dedicated circuit. During routine monitoring, the network administrator notices that during periods of high traffic, the servers need to retransmit the same data multiple times in order to complete file transfers. A packet capture of the data headers indicates that the discard Eligible (DE) bit is set to one. What must the administrator do to correct this problem? A. Have the ISP increase the local access rate. B. Replace the cables connecting the server to the CSU/DSU. C. Switch to a different ISP, which will provide better QoS. D. Contact the ISP to have the Committed Interface Rate (CIR) increased. 6. What is the purpose of encrypting traffic on a secure VPN? A. To ensure that traffic is routed along the VPN. B. To ensure that data sent across the VPN between both authenticated endpoints is not viewable as clear text C. To ensure that traffic coming from unauthorized personnel does not conflict with traffic from authorized personnel D. To ensure that all traffic coming from the Internet is not viewable in clear text 7. Match the encapsulation protocol with the corresponding description. Protocol A. GRE B. IPSec C. L2F D. PPTP E. L2TP Description 1. A framework of open standards and functions at the Network Layer. 2. A protocol developed by Microsoft used to create VPNs across TCP/IP networks. 3. An IETF standard protocol used to tunnel Layer 2 PPP packets through a public network using IP. 4. Can encapsulate a wide variety of protocol packet types inside IP tunnels. 5. A protocol that supports the creation of secure virtual private dialup networks over the Internet by tunnelling Layer 2 frames. 8. Where should the VPN server be located on the network to handle the encrypted data? A. After the traffic has entered the internal network B. Before the flow of traffic reaches the internal network C. At the user endpoint D. At the service provider edge as traffic arrives from the user endpoint 9. When troubleshooting a Frame Relay connection, an administrator entered the show interfaces s0/0 command and received the output shown in the exhibit. What are two probable reasons for this problem? (Choose two.) Exhibit Singapore# s hint S0/0 Serial0/0 is up, line protocol is down Hardware is PowerQUICC Serial Internet Address is 192.168.192.4/24 MTU 1500 bytes, B/W 128 Kbit, DLY 20000 usec, Reliability 255/255, txload 1/255, rxload 1/255 Encapsulation FRAME-RELAY, loopback not set Keepalive set (10 sec) LMI enq sent 43, LMI stat recvd 0, LMI upd recvd 0, DTE LMI down LMI enq recvd 0, LMI stat sent 0, LMI upd sent 0 LMI DLCI 0 LMI type is ANSI ANNEX D framerelay DTE Broadcast queue 0/64, broadcasts sent/dropped 12/0, interface broadcast 8 Last input 00:00:01, output hang never Last clearing of ?show interface? counters 00:07:13 A. The cable between the CSU/DSU and the router is disconnected. B. The serial 0/0 interface is shutdown. C. The router is not configured for the same Frame Relay PVVC as the switch. D. The LMI type on the Frame Relay switch is NOT ANSI. E. The address of the Frame Relay switch is not in the routing table. 10. What provides data confidentiality in a VPN? A. Hashing B. Tunnelling C. Encryption D. Data headers E. Encapsulation F. SHA or MD5