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	Explanation: C: Link State update (LSU) traffic is reduced. Rather than send an LSU about each network within an area, you can advertise a single or fewer summarized routes between areas to reduce the overhead associated with linkstate updates when they are crossing areas. Note: All LSA types, except the AS-external-LSAs (LS type = 5), are flooded throughout a single area only. D: Topological database size would decrease and fewer CPU cycles would be required to calculate routes. Incorrect Anss A: A DR and B+DR for each area would still be required. B: Security concerns would not be eliminated. Q6 In a multi point OSPF network, what type of router floods type 2 Link State Advertisements (LSA's) in an OSPF area?A. DRB. ABRC. BDRD. ASBR Ans: A Explanation: Type 2 LSAs are generated by Designated Routers (DRs) in multiaccess networks. They describe the set of routers attached to a particular network and are flooded within the area that contains the network only. Note: Instead of each router exchanging link-state information with every other router on the segment, each router sends the link-state information to the DR and Backup Designated Router (BDR). The DR sends each router's link-state information to all other routers in the network. This flooding process significantly reduces the router-related traffic on a segment. Incorrect Anss B: Area Border Routers generate Type 3 and Type 4 LSAs. C: BDRs are just used for backup D: Autonomous System Boundary Routesr (ASBRs) generate Type 5 LSAs. Q7 Your newly appointed CertKing trainee wants to know what OSPF area can accept type 7 external routes but not type 5 external routes. What will your reply be?A. A not-so stubby areaB. A stubby areaC. A totally stubby areaD. A backbone areaE. An on-demand area Ans: A Explanation: The NSSA external LSA -Identified as Type 7, these LSAs are created by the ASBR residing in a not so stubby area (NSSA). This LSA is similar to an autonomous system external LSA, except that this LSA is contained within the NSSA area and is not propagated into other areas, but it is converted into a Type 5 LSA by the ABR. An NSSA is an area that is seen as a stub area but can receive external routes, which it will not propagate into the backbone area and thus the rest of the OSPF domain. Another LSA, Type 7, is created specifically for the NSSA. This LSA can be originated and communicated throughout the area, but it will not be propagated into other areas, including Area 0. If the information is to be propagated throughout the AS, it is translated into an LSA Type 5 at the NSSA ABR. Q8 Match the OSPF area type on the left to the type of OSPF routes it will support. Q9 Which of the following OSPF routes are supported by the Totally Stubby type? (Select two)A. OB. O IAC. O N2D. O* N2E. O* IA Ans: A, E Q20 Which type of OSPF network requires manual configuration of OSPF neighbors?A. broadcast multi-accessB. nonbroadcast multi-accessC. point-to-pointD. point-to-multipoint Ans: B Q21 Which of the following OSPF routes are supported by the Stub Area type? (Select three)A. OB. O IAC. O N2D. O* N2E. O* IA Ans: A, B, E Q22 Which of the following OSPF routes are supported by the Not-So-Stubby-Area (NSSA) type? (Select three)A. OB. O IAC. O N2D. O* N2E. O* IA Ans: B, C, D Q23 During a recent OSPF election among three routers, CK1 was elected the DR and CK2 was elected the BDR, as seen in the graphic. Assume that CK1 fails, and that CK2 takes the place of the DR wile CK3 becomes the new BDR. What will happen when CK1 comes back online?A. CK1 will take the place of DR immediately upon establishing its adjacencies.B. CK1 will take the place of DR only if CK2 fails.C. CK1 will take the place of DR only if both CK2 and CK3 fails.D. A new election will take place establishing an all new DR and BDR based on configured priority levels an MAC addresses. Ans: C If a router with a higher priority value gets added to the network, it does not preempt the DR and BDR. The only time a DR and BDR changes is if one of them is out of service. If the DR is out of service, the BDR becomes the DR, and a new BDR is selected. If the BDR is out of service, a new BDR is elected. Source: CCNP Self-Study Second Edition P.243 Topic: Electing a DR Section 10: Explain basic OSI terminology and network layer protocols used in OSI (6 questions) Q 1 In what OSI system does a router belong to?A. end systemB. routing systemC. inter-domain systemD. intermediate systemE. intra-domain system Ans: D Explanation: An easy way to remember this is the OSI routing protocol IS-IS, which stands for 'Intermediate System to Intermediate System.' Q2 The network layer of the OSI protocol suite defines two of the routing protocols below. Which two are they? (Select two)A. End System-to-End SystemB. Routing Information ProtocolC. Interior Gateway Routing ProtocolD. Intermediate System-to-Intermediate SystemE. Intermediate System-to-End System Ans: D, E Explanation: Both are defined by ISO in the OSI protocol suite. Intermediate System-to-Intermediate System (IS-IS) Protocol is an intradomain Open System Interconnection (OSI) dynamic routing protocol specified in International Organization for Standardization (ISO) 10589. The protocol is designed to operate in OSI Connectionless Network Service (CLNS). Data is carried using the protocol specified in ISO 8473. OSI CLNS is a network layer service similar to bare IP service. A CLNS entity communicates over Connectionless Network Protocol (CLNP) with its peer CLNS entity. Reference: http://www.cisco.com/en/US/tech/ CK3 65/ CK3 81/technologies_white_paper09186a00800a3e6f.sht ml Q3 Which of the following routing protocols belongs in the network layer of the OSI protocol suite?A. End System-to End SystemB. Routing Information ProtocolC. Interior Gateway Routing ProtocolD. Intermediate System-to-Intermediate System Ans: D Explanation: Intermediate System-to-Intermediate System (IS-IS) Protocol is an intradomain Open System Interconnection (OSI) dynamic routing protocol specified in International Organization for Standardization (ISO) 10589. The protocol is designed to operate in OSI Connectionless Network Service (CLNS). Data is carried using the protocol specified in ISO 8473. OSI CLNS is a network layer service similar to bare IP service. A CLNS entity communicates over Connectionless Network Protocol (CLNP) with its peer CLNS entity. Reference: http://www.cisco.com/en/US/tech/ CK3 65/ CK3 81/technologies_white_paper09186a00800a3e6f.sht ml Q4 In network engineering and computer science the term domain can be interpreted in multiple contexts. How is a domain defined in OSI terminology?A. A set of non-routing network nodes.B. A contiguously connected area that can reach all other areas.C. All devices configured for OSI protocols within an internetwork.D. A contiguous set of routers and hosts and the data links that connect them.E. Any portion of an OSI network that is under a common administrative authority. Ans: E Explanation: A domain is any portion of an OSI network that is under a common administrative authority. Note: A domain is a collection of End Systems, Intermediate Systems, and subnetworks operated by a single organization or administrative authority. The components which make up the domain are assumed to interoperate with a significant degree of mutual trust among themselves, but interoperate with other Administrative Domains in a mutually suspicious manner Reference: ISO TR 9575 Q5 What is a definition of a domain (in OSI terminology)?A. A set of non-routing network nodes.B. A contiguously connected area that can reach all other areas.C. Contiguous set of routers and hosts and the data links that connect them.D. Any portion of an OSI network that is under a common administrative authority. Ans: D Explanation: An AS is a collection of networks under a common administration that share a common routing strategy. Autonomous systems are subdivided into areas, and an AS is sometimes called a domain. Reference: http://www.cisco.com/univercd/cc/td/doc/cisintwk/ito_doc/introint.htm Free CCNA braindumps \| Free CCNA training \| 640 801 practice exams \| Cisco certification course \| Cisco job \| CCDA certification training \| CCNP braindump \| Cisco CCNA certification braindumps \| Cisco practice test questions \| CCIE bootcamp \| CCNA study guide \| CCIE voice \| CCNP practice exam questions \|