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Q31. - (Topic 2) 

What is the default maximum number of equal-cost paths that can be placed into the routing table of a Cisco OSPF router? 

A. 2 

B. 4 

C. 16 

D. unlimited 

Answer:

Explanation: 

4 is the default number of routes that OSPF will include in routing table if more than 4 equal cost routes exist for the same subnet. However, OSPF can include up to 16 equal cost routes in the routing table and perform load balancing amongst them. In order to configure this feature, you need to use the OSPF subcommand maximum-paths, i.e. maximum-paths 16. 


Q32. - (Topic 2) 

Refer to the exhibit. 

What information about the interfaces on the Main_Campus router is true? 

A. The LAN interfaces are configured on different subnets. 

B. Interface FastEthernet 0/0 is configured as a trunk. 

C. The Layer 2 protocol of interface Serial 0/1 is NOT operational. 

D. The router is a modular router with five FastEthernet interfaces. 

E. Interface FastEthernet 0/0 is administratively deactivated. 

Answer:

Explanation: 

Interface fa0/0 breaks into sub-interfaces and Main_Campus router is connected with switch via fa0/0 .Subinterfaces configured with different subnet masks so the same switch has multiple vlans and allows communication between these VLAN's. For routing and inter-vlan we need to configure a trunk port. So B will be the correct answer. 


Q33. - (Topic 2) 

What information does a router running a link-state protocol use to build and maintain its topological database? (Choose two.) 

A. hello packets 

B. SAP messages sent by other routers 

C. LSAs from other routers 

D. beacons received on point-to-point links 

E. routing tables received from other link-state routers 

F. TTL packets from designated routers 

Answer: A,C 

Explanation: 

Link State Routing Protocols http://www.ciscopress.com/articles/article.asp?p=24090&seqNum=4 

Link state protocols, sometimes called shortest path first or distributed database protocols, are built around a well-known algorithm from graph theory, E. W. Dijkstra'a shortest path algorithm. Examples of link state routing protocols are: Open Shortest Path First (OSPF) for IP The ISO's Intermediate System to Intermediate System (IS-IS) for CLNS and IP DEC's DNA Phase V Novell's NetWare Link Services Protocol (NLSP) Although link state protocols are rightly considered more complex than distance vector protocols, the basic functionality is not complex at all: 

1. Each router establishes a relationship—an adjacency—with each of its neighbors. 

2. Each router sends link state advertisements (LSAs), some 

3. Each router stores a copy of all the LSAs it has seen in a database. If all works well, the databases in all routers should be identical. 

4. The completed topological database, also called the link state database, describes a graph of the internetwork. Using the Dijkstra algorithm, each router calculates the shortest path to each network and enters this information into the route table. 


Q34. - (Topic 1) 

What are two characteristics of a switch that is configured as a VTP client? (Choose two.) 

A. If a switch that is configured to operate in client mode cannot access a VTP server, then the switch reverts to transparent mode. 

B. On switches that are configured to operate in client mode, VLANs can be created, deleted, or renamed locally. 

C. The local VLAN configuration is updated only when an update that has a higher configuration revision number is received. 

D. VTP advertisements are not forwarded to neighboring switches that are configured in VTP transparent mode. 

E. VTP client is the default VTP mode. 

F. When switches in VTP client mode are rebooted, they send a VTP advertisement request to the VTP servers. 

Answer: C,F 

Explanation: 

VLAN Trunking Protocol (VTP) http://archive.networknewz.com/2004/0317.html 

VTP Modes Server Mode Once VTP is configured on a Cisco switch, the default mode used is Server Mode. In any given VTP management domain, at least one switch must be in Server Mode. When in Server Mode, a switch can be used to add, delete, and modify VLANs, and this information will be passed to all other switches in the VTP management domain. Client Mode When a switch is configured to use VTP Client Mode, it is simply the recipient of any VLANs added, deleted, or modified by a switch in Server Mode within the same management domain. A switch in VTP client mode cannot make any changes to VLAN information. Transparent Mode A switch in VTP Transparent Mode will pass VTP updates received by switches in Server Mode to other switches in the VTP management domain, but will not actually process the contents of these messages. When individual VLANs are added, deleted, or modified on a switch running in transparent mode, the changes are local to that particular switch only, and are not passed to other switches in the VTP management domain. 


Q35. - (Topic 2) 

Which statements are true about EIGRP successor routes? (Choose two.) 

A. A successor route is used by EIGRP to forward traffic to a destination. 

B. Successor routes are saved in the topology table to be used if the primary route fails. 

C. Successor routes are flagged as 'active' in the routing table. 

D. A successor route may be backed up by a feasible successor route. 

E. Successor routes are stored in the neighbor table following the discovery process. 

Answer: A,D 

Explanation: 

Introduction to EIGRP http://www.cisco.com/en/US/tech/tk365/technologies_tech_note09186a0080093f07.shtml 

Feasible Successors A destination entry is moved from the topology table to the routing table when there is a feasible successor. All minimum cost paths to the destination form a set. From this set, the neighbors that have an advertised metric less than the current routing table metric are considered feasible successors. 

Feasible successors are viewed by a router as neighbors that are downstream with respect to the destination. 

These neighbors and the associated metrics are placed in the forwarding table. 

When a neighbor changes the metric it has been advertising or a topology change occurs in the network, the set of feasible successors may have to be re-evaluated. However, this is not categorized as a route recomputation. 


Q36. - (Topic 3) 

Refer to the exhibit. 

The show interfaces serial 0/1 command was issued on the R10-1 router. Based on the output displayed which statement is correct? 

A. The cable connected to the serial 0/1 interface of the R10-1 router is a DTE cable. 

B. The R10-1 router can ping the router interface connected to the serial 0/1 interface. 

C. The clock rate used for interface serial 0/1 of the R10-1 router is 1,544,000 bits per second. 

D. The CSU used with the serial 0/1 interface of the R10-1 router has lost connection to the service provider. 

E. The interface of the remote router connected to the serial 0/1 interface of the R10-1 router is using the default serial interface encapsulation. 

Answer:

Explanation: 

Cisco High-Level Data Link Controller (HDLC) is the Cisco proprietary protocol for Cisco HDLC is the default encapsulation type for the serial interfaces. 


Q37. DRAG DROP - (Topic 2) 

Answer: 

Explanation: 

Enhanced Interior Gateway Routing Protocol (EIGRP) is a Cisco proprietary routing protocol, so it is vendor-specific. By default, EIGRP internal routes have an administrative distance value of 90. OSPF uses cost as its metric. By default, the cost of an interface is calculated based on bandwidth with the formula cost= 10000 0000/bandwidth (in bps). OSPF elects a DR on each broadcast and nonbroadcast multiaccess networks (like Ethernet and Frame Relay environments, respectively). It doesn’t elect a DR on point-to-point link (like a serial WAN). 


Q38. - (Topic 2) 

Which statement describes the process ID that is used to run OSPF on a router? 

A. It is globally significant and is used to represent the AS number. 

B. It is locally significant and is used to identify an instance of the OSPF database. 

C. It is globally significant and is used to identify OSPF stub areas. 

D. It is locally significant and must be the same throughout an area. 

Answer:

Explanation: The Process ID for OSPF on a router is only locally significant and you can use the same number on each router, or each router can have a different number-it just doesn't matter. The numbers you can use are from 1 to 65,535. Don't get this confused with area numbers, which can be from 0 to 4.2 billion. 


Q39. - (Topic 3) 

In the Frame Relay network, 

which IP addresses would be assigned to the interfaces with point-to-point PVCs? 

A. DLCI 16 192.168.10.1/24 DLCI 17 192.168.10.1/24 DLCI 99 192.168.10.2/24 DLCI 28 192.168.10.3/24 

B. DLCI 16 192.168.10.1 /24 DLCI 17 192.168.11.1/24 DLCI 99 192.168.12.1/24 DLCI 28 192.168.13.1/24 

C. DLCI 16 192.168.10.1/24 DLCI 17 192.168.11.1/24 DLCI 99 192.168.10.2/24 DLCI 28 192.168.11.2/24 

D. DLCI 16 192.168.10.1/24 DLCI 17 192.168.10.2/24 DLCI 99 192.168.10.3/24 DLCI 28 192.168.10.4/24 

Answer:

Explanation: 

DLCI 16 and DLCI 19 need to act like a point-to-point link and will therefore need to be on the same network as will DLCI 17 and DLCI 28. With this information we can see that option "B" is the only option that has the corresponding DLCI's on the same network based on the ip addresses and subnetmask. Option "D" is incorrect because, this would put the same network on both interfaces of the R2 router. Option "A" is similar. 


Q40. - (Topic 2) 

Refer to the exhibit. 

Based on the exhibited routing table, how will packets from a host within the 192.168.10.192/26 LAN be forwarded to 192.168.10.1? 

A. The router will forward packets from R3 to R2 to R1. 

B. The router will forward packets from R3 to R1 to R2. 

C. The router will forward packets from R3 to R2 to R1 AND from R3 to R1. 

D. The router will forward packets from R3 to R1. 

Answer:

Explanation: 

From the routing table we learn that network 192.168.10.0/30 is learned via 2 equal- cost paths (192.168.10.9 &192.168.10.5) - traffic to this network will be load-balanced.