Chapter 9. Serial WAN and Frame Relay Connections

1:	Your junior network administrator asks what type of frame relay encapsulation should be used for your branch office, which contains 25 routers: 15 are Cisco 2611s, 5 are Cisco 3640s, and 5 are a mix of other vendors. What do you tell her? A. Cisco B. Q.333a C. IETF D. ANSI
2:	What function does a frame relay DLCI provide with respect to a router and a frame relay switch? A. Defines the signaling standard between a router and the frame relay switch B. Identifies the signaling between a router and the destination router C. Identifies the circuit between a router and the frame relay switch D. Identifies the encapsulation used between two routers
3:	What is the default Local Management Interface (LMI) frame type used by a Cisco router? A. ANSI B. Cisco C. IETF D. Q.933a E. Modified cut-through
4:	You are required to troubleshoot the WAN link between the Acme, Inc., main office in Baltimore and the Acme, Inc., remote office in Taiwan. A Cisco router that was providing frame relay connectivity at the Taiwan site is replaced with a different vendor's frame relay router. Connectivity is now down between the Baltimore and Taiwan site, but you can still get to the Phoenix remote site using frame relay. What is the most likely cause of the problem? A. Mismatched LMI types B. Incorrect DLCI C. No authentication D. Incorrect IP address mapping
5:	You are having routing table issues because of RIP running over your frame relay connections. Your router is not updating other remote sites as a result of split-horizon issues. What can you do to alleviate this problem? A. Create frame relay maps B. Configure frame relay proxies C. Configure LMI to update the router D. Create sub-interfaces on the interface the updates come in on
6:	Frame relay is an ITU-T and ANSI standard that defines the process of sending data over a ______________. A. Packet-switched line B. Circuit-switched line C. Leased-line D. Local area network
7:	Frame relay primarily encapsulates information from the upper layers of the OSI Model at the ___________ layer. A. Application B. Transport C. Session D. Data-link E. Physical
8:	Which of the following is the signaling standard between the router device and the frame relay switch that is responsible for managing the connection and maintaining the status between the devices? A. DLCI B. LMI C. PVC D. IETF
9:	In which frame relay topology do all routers have virtual circuits to all other destinations? A. Star B. Hub and spoke C. Bus D. Partial mesh E. Full mesh
10:	The nonbroadcast multi-access nature of frame relay causes issues with what routing loop preventative mechanism? A. Route poisoning B. Hold-down timers C. Triggered updates D. Split-horizon
11:	If you are unable to support Inverse ARP to map DLCIs to network layer addresses, what method do you need to use? A. Static routes B. Static maps C. DHCP D. LMI mapping
12:	Which of the following commands configures a static map of the remote IP address 172.16.12.2 to the DLCI of 100? A. Frame relay map dlci 100 ip 172.16.12.2 B. Frame relay rarp ip 172.16.12.2 100 C. Frame relay lmi dlci 172.16.12.2 100 broadcast D. Frame relay map ip 172.16.12.2 100 broadcast
13:	Which of the following commands gives you the current frame relay map entries? A. Show ip frame B. Show ip route C. Show frame relay map D. Show ip interfaces brief
14:	What are issues to consider if you turn off split-horizon in a frame relay environment? (Choose two.) A. You cannot turn off split-horizon on an IP network. B. Routing updates can no longer get through. C. Not all Layer 3 protocols allow you to disable split-horizon. D. You can open up your network to routing loops.
15:	When you are setting up frame relay for point-to-point sub-interfaces, which of the following must not be configured? A. The frame relay encapsulation on the physical interface B. The local DLCI on each sub-interface C. An IP address on the physical interface D. The sub-interface type as point-to-point
16:	The frame relay circuit illustrated in the figure below is experiencing congestion. Which of the following techniques could be used to help alleviate the congestion and notify the routers? (Choose three.) A. FECN B. BECN C. DE bit D. LMI E. CIR
17:	Which frame relay mechanism is responsible for transmitting keepalives to ensure that the PVC does not shut down because of inactivity? A. LMI B. BECN C. FECN D. DLCI
18:	You are the network administrator of a frame relay network topology that consists of a high-speed (1.544Mbps) connection at the central site and low-speed (64Kbps) connections at the branch sites. Because of the speed mismatch, a bottleneck often exists for traffic on a virtual circuit when the central site tries to communicate with the branch offices. What can you do to resolve this issue without spending more money? A. Use a slower link at the branch offices B. Use a faster link at the branch offices C. Use frame relay traffic shaping D. Use more PVCs
19:	Your junior network administrator asks you what the CIR is with regard to frame relay. What do you tell her? A. It's the value that specifies the maximum average data rate that the network undertakes to deliver under "normal conditions." B. It's a 10-bit number in the address field of the frame relay frame header that identifies the VC. C. It's a method of dynamically associating the remote router network layer address with a local DLCI. D. It's a signaling standard between the router (DTE device) and the local frame relay switch (DCE device).
20:	You are the network administrator for a medium-size corporation with eight branch offices. Each office is running frame relay to your central site and is running connections to the other offices for a full mesh topology. You are told that you have just added two new branch offices that need to be fully meshed. How many total PVCs must you have in your full mesh? A. 10 B. 20 C. 25 D. 45
21:	X.25 was the predecessor to frame relay and is still used in certain parts of the world. What is the main difference between X.25 and frame relay? A. X.25 is faster and more expensive than frame relay. B. Frame relay does not carry the overhead of X.25. C. X.25 is cell-switched and frame relay is packet-switched. D. X.25 is standards-based and frame relay is proprietary.
22:	Which of the following statements is true regarding virtual circuits? A. Virtual circuits are single-streamed data links over a service provider's network. B. Switched virtual circuits are the most popular of the virtual circuits. C. Permanent virtual circuits are used when you need periodic use of the frame relay circuit. D. Switched virtual circuits require call setup and teardown.
23:	For Inverse ARP to work, which of the following must be in place? (Choose three.) A. A virtual circuit must be in place. B. LMI must be operating correctly. C. Your routing protocol must support Inverse ARP. D. You must be running Cisco IOS 11.2 or higher.
24:	You are running frame relay in your network, in a star topology. All of your equipment at your central site is Cisco. Your branch offices are running Cisco routers, but one of your branch offices does not have a Cisco router. How can you enable a frame relay connection to this branch office? A. Use a static frame map and specify IETF as the encapsulation. B. Use IETF as your encapsulation at the central site. C. You must purchase a Cisco router. D. You can use a frame relay proxy.
25:	You have two routers connected over a frame relay network. The router in Arizona has the IP address 10.1.1.1/24 and uses a local DLCI of 512. The router in Michigan has the IP address 10.1.1.2/24 and uses a local DLCI of 598. Which of the following syntax correctly creates a static map that allows Arizona to reach Michigan and allows routing protocol functionality? A. frame-relay map ip 10.1.1.2 512 broadcast B. frame-relay map ip 10.1.1.1 512 broadcast C. frame-relay map ip 10.1.1.2 598 broadcast D. frame-relay map ip 10.1.1.1 598 broadcast
26:	You are troubleshooting your frame relay connections. After you type in the show frame-relay pvc command, one of your PVCs shows up as DELETED. What causes this message? A. Your router is incorrectly configured. You need to add the right DLCI information, and the circuit should come up. B. The remote router is incorrectly configured. C. You are physically disconnected from the service provider. D. You need to switch from a multipoint configuration to a point-to-point configuration and create a sub-interface for each PVC you plan on using.
27:	You are having connectivity problems with your frame relay connection. Which of the following commands displays information regarding the encapsulation, Layer 1, and Layer 2 status? A. Show frame relay pvc B. Show interface serial C. Show encapsulation frame relay D. Show running-config
28:	You are troubleshooting your frame relay connection and have called your service provider. The technician asks you for your circuit number. What is the significance of this circuit number? A. It is the local loop identifier. B. It is the DLCI. C. It is the LMI. D. It is the CIR.
29:	What command do you type to receive the output generated here? LMI Statistics for interface Serial0 (Frame Relay DCE) LMI TYPE = CISCO Invalid Unnumbered info 0 Invalid Prot Disc 0 Invalid dummy Call Ref 0 Invalid Msg Type 0 Invalid Status Message 0 Invalid Lock Shift 0 Invalid Information ID 0 Invalid Report IE Len 0 Invalid Report Request 0 Invalid Keep IE Len 0 Num Status Enq. Rcvd 72 Num Status msgs Sent 71 Num Update Status Sent 0 Num St Enq. Timeouts 0 Router1# A. Show frame relay B. Show frame relay pvc C. Show frame relay lmi D. Show frame relay encapsulation
30:	What command do you type to see the following output on your Cisco router? Jul 12 14:21:45.667: Serial0(in): StEnq, myseq 112 Jul 12 14:21:45.671: RT IE 1, length 1, type 1 Jul 12 14:21:45.671: KA IE 3, length 2, yourseq 115, myseq 112 Jul 12 14:21:45.675: Serial0(out): Status, myseq 113, yourseen 115, DCE up Jul 12 14:21:55.587: Serial0(in): StEnq, myseq 113 Jul 12 14:21:55.587: RT IE 1, length 1, type 1 Jul 12 14:21:55.591: kA IE 3, length 2, yourseq 116, myseq 113 Jul 12 14:21:55.591: Serial0(out): Status, myseq 114, yourseen 116, DCE up A. Show frame relay B. Show frame relay lmi C. Debug frame relay D. Debug frame relay lmi E. Debug all
31:	By default, LMI signaling is sent every ___________ seconds. A. 10 B. 20 C. 30 D. 60
32:	Which two implementation agreements were made between the ATM and Frame Relay Forums to make communications possible between them? (Choose two.) A. FRF.1 B. FRF.5 C. FRF.8 D. FRF.11
33:	Which of the following is an accurate statement regarding frame relay? A. Frame relay is an ITU-T and ANSI standard that defines the process for sending data over the public, packet-switched network. B. The core aspects of frame relay function at the middle two layers of the OSI Model. C. Frame relay allows you to connect your sites with a star topology only. D. Frame relay operates in a VLAN environment.
34:	Your boss asks you about the significance of the OSI Model to frame relay. What do you tell her? A. Frame relay operates at all layers of the OSI Model. B. Frame relay operates at the top layers of the OSI Model. C. Frame relay operates at the middle layers of the OSI Model. D. Frame relay operates at the bottom two layers of the OSI Model.
35:	What command do you type on Router1 to see the following output? PVC Statistics for interface Serial0 (Frame Relay DCE) Active Inactive Deleted Static Local 1 0 0 0 Switched 0 0 0 0 Unused 0 0 0 0 DLCI = 101, DLCI USAGE = LOCAL, PVC STATUS = ACTIVE, INTERFACE = Serial0 input pkts 207 output pkts 239 in bytes 15223 out bytes 14062 dropped pkts 0 in FECN pkts 0 in BECN pkts 0 out FECN pkts 0 out BECN pkts 0 in DE pkts 0 out DE pkts 0 out bcast pkts 17 out bcast bytes 3264 PVC create time 00:11:32, last time PVC status changed 00:11:32 Router1# A. Show frame relay lmi B. Show frame relay pvc C. Show frame relay virtual circuit D. Show frame relay all
36:	Which of the following frame relay topologies is the least expensive of them all? A. Full mesh B. Partial mesh C. Hub and spoke D. NBMA
37:	You have been assigned a CIR of 64Kbps. Your network has been occasionally sending traffic that exceeds your CIR. What does the service provider do? A. Nothing B. Discard all extra data over 64Kbps C. Allow the traffic but charge you an extra fee D. Mark extra frames with a DE bit and do its best to deliver the packets
38:	Which of the following is implemented to inform the receiving DTE that there is congestion on the network? A. FECN B. BECN C. DE D. CIR
39:	What are the requirements of a service provider for a frame relay connection to be made? (Choose four.) A. PVC B. CIR C. Inverse ARP D. LMI E. DLCI
40:	You are discussing frame relay with your service provider, and your representative asks you whether you prefer EIA/ TIA-530 or V.35. To what is she referring? A. The signaling standard for frame relay B. The protocol for sending frame relay across the frame cloud C. The cable that connects you to the DCE D. The connector for the Cisco router
41:	Which two devices are necessary for frame relay connection? (Choose two.) A. Data terminal equipment B. Data termination equipment C. Data transport equipment D. Data communications equipment E. Data clocking equipment F. Data circuit equipment
42:	Which of the following can solve the problem of split-horizon in a frame relay environment? (Choose three.) A. Use a fully meshed topology B. Use sub-interfaces C. Turn off split-horizon D. Use RIPv2 as your routing protocol
43:	What is the primary purpose of using sub-interfaces for frame relay? A. To allow more than one frame relay connection on the router B. To allow you to use more than one physical interface C. To overcome split-horizon D. To save IP addresses
44:	You are troubleshooting your frame relay connection and notice that LMI reports the PVC is in an "inactive state." What does this mean? A. The virtual circuit connection is active and the routers can exchange data. B. The local connection to the frame relay switch is working, but the remote router's connection to the remote frame relay switch is not working. C. No LMI is being received from the frame relay switch, or no service exists between the router and the local frame relay switch. D. The interface has been shut down.
45:	Which of the following states represents a virtual circuit connection that is active and data is being exchanged over the frame relay network? A. Inactive state B. Deleted state C. Blocked state D. Active state
46:	Which of the following are valid LMI signaling types? (Choose three.) A. Cisco B. ANSI C. ITU-T D. Q.933a
47:	You type the following configuration into a router. When you execute the show ip route command, however, you do not notice any new routes. What is wrong with the configuration? router rip network 10.0.0.0 network 172.19.0.0 version 2 interface serial 0/0 ip address 10.0.0.1 255.0.0.0 frame-relay map ip 10.0.0.2 100 frame-relay interface-dlci 100 no frame-relay inverse-arp interface ethernet 0/0 ip address 172.19.0.0 255.255.0.0 A. The frame-relay map command is missing the broadcast keyword. B. RIP should be running version 1, not version 2. C. Inverse ARP should be enabled. D. RIP is not activated on the interfaces.
48:	How often do routers send Inverse ARP packets on all active DLCIs by default? A. Every 10 seconds B. Every 60 seconds C. Every 90 seconds D. Every 120 seconds
49:	On a frame relay switch, what is the first step that the switch performs on the incoming frame? A. It adds the two DLCI values in the header of the frame relay frame. B. It forwards the frame to the appropriate switch.slot.port. C. It checks the inbound DLCI number. D. It looks up the corresponding DLCI number for the remote router interface.
50:	Which of the following topologies is shown in the figure below? A. Partial mesh B. Full mesh C. Ring mesh D. Hub and spoke