Cisco Exam #642-871: ARCH Exam (MeasureUp, set 1)
Work on your understanding of network design and technologies for the CCDP with these 10 sample questions from MeasureUp.
courtesy of MeasureUp
Question:
1. You have the following campus design network geography requirements:
- You are designing an intra-building solution.
- High availability is very important.
- Costs must be kept to a minimum.
Which connectivity type should you implement?
a. Fiber
b. Multimode Fiber
c. Singlemode Fiber
d. Copper
e. UTP
2. Under which condition is a multicast transmission NOT a viable alternative?
a. When UDP transmissions are sent
b. When packet delivery must be guaranteed
c. When guaranteed delivery is not important
d. When the same information must be sent to multiple users on the network
3. You are in charge of designing multicasts for a large campus network and are in the process of placing the RPs on the network. How should the RPs be arranged? (Choose two.)
a. The RPs should be distributed throughout the network.
b. The RPs should be responsible for the same multicast addresses.
c. The RPs should be in distributed on the campus backbone only.
d. The RPs should be distributed on the campus access layer only.
e. The RPs should be responsible for different ranges of multicast addresses.
4. Where is the ideal placement for a VPN concentrator when designing a VPN?
a. Behind a switch
b. Behind a bridge
c. At the Internet access point's edge
d. Behind a router
5. You must configure a VPN connection through a NAT router that is using PAT. What must you configure to enable this functionality for an IPSec VPN?
a. NAT overloading
b. Overlapping NAT
c. Static NAT
d. NAT traversal
6. Which product specifically allows you to view logical maps of Cisco routers that are configured with RSRB, DLSw, and APPN?
a. CiscoWorks
b. CiscoView
c. CiscoWorks Blue Maps
d. Netsys
7. Which statement best describes EtherChannel?
a. EtherChannel logically bundles multiple physical connections.
b. EtherChannel encapsulates data into IP packets.
c. Authentication can occur using a Radius or TACACS+ server.
d. EtherChannel can span the entire area of the WAN.
e. EtherChannel can transfer data at rates exceeding 100 Mbps.
f. EtherChannel interconnects to SAN islands using FCIP.
8. A client has hired you to save WAN bandwidth on his network. The network is comprised of a corporate headquarters with 500 nodes, a branch office with 300 nodes, and two other branch offices with 250 nodes. How many hours of storage space on a content engine should you allow for the content network when you are designing it?
a. 6 to 12
b. 12 to 24
c. 24 to 48
d. 24 to 72
9. What are the characteristics of a Cisco site-to-site VPN?
a. IPSec tunnels, Cisco head-end VPN routers, Cisco VPN access routers, and Internet access
b. GRE tunnels, Cisco head-end VPN routers, Cisco VPN access routers, and Internet access
c. IPSec and GRE tunnels and Internet access
d. IPSec and GRE tunnels, Cisco head-end VPN routers, and Cisco VPN access routers
e. IPSec and GRE tunnels, Cisco head-end VPN routers, Cisco VPN access routers, and Internet access
10. Which type of Layer 2 or Layer 3 campus network should you implement to meet the following requirements?
a. Layer 2 everywhere
b. Layer 3 everywhere
c. Layer 3 in distribution only
d. Layer 3 in core and distribution
1. Answer E is correct. For an intra-building solution, you should use unshielded twisted pair (UTP) cable if cost is a concern, high availability is important, and you require medium throughput. For an intra-building solution, you should use fiber if cost is not a concern, medium availability is important, and you require high throughput. For an inter-building solution, you should use multimode fiber if medium availability is important and you require high throughput. For a distant remote building, you should use singlemode fiber. It provides for low availability and medium throughput. For a distance over 100 kilometers, you should use copper. It provides for low availability and low throughput.
2. Answer B is correct. Multicast traffic uses the User Datagram Protocol (UDP) to transmit multicasts. Because of this, there is a possibility that packets will arrive out of order or that multiple identical packets will be received. However, multicasts are ideal for delivering data streams to multiple users on the network if guaranteed delivery is not an issue. Since only Transmission Control Protocol (TCP) transmissions can use the TCP slow start mechanisms of Weighted Random Early Detection (WRED), multicasts should not be used when guaranteed delivery of data is required.
3. Answers A and E are correct. In a large campus network, route processors (RPs) should be distributed throughout the network and they should be configured so they are each responsible for a different range of IP addresses. In a small campus network, it is acceptable to have a single RP in the campus backbone that is responsible for all multicast traffic. In a wide area network (WAN) design, RPs should be placed as close to the source router as possible.
4. Answer D is correct. When designing a virtual private network (VPN), it is imperative that the VPN concentrator be placed behind a router to protect it from direct exposure to the Internet. Since the Internet uses Layer 3 addressing, Layer 2 devices are not sufficient to protect the VPN concentrator from the Internet.
5. Answer D is correct. Network address translation (NAT) traversal allows a NAT router running port address translation (PAT) to use a User Datagram Protocol (UDP) header so IPSec negotiation can occur. However, the use of NAT traversal is not very scalable and works best in smaller network environments. NAT overloading allows multiple internal IP addresses to use a single external address. Static NAT is a manual mapping of internal IP addresses to a single external IP address. Overlapping NAT is used when multiple locations have the same internal private IP addressing structure.
6. Answer C is correct. CiscoWorks Blue Maps enables you to view logical maps of Cisco routers that are running Cisco IOS Release 11.0 or later and are configured with either remote source-route bridging (RSRB), data-link switching (DLSw), or Advanced Peer-to-Peer Networking (APPN). Each application (RSRB, DLSw, or APPN) presents the network administrator with a dynamic, color-coded network map of routers that are enabled with a specific SNA-related protocol. CiscoWorks Blue Maps requires the related MIBs (RSRB, DLSw, and APPN) to be installed on the routers. CiscoView (formerly a part of the CiscoWorks package) is a graphical device management technology that is the standard for managing Cisco devices.
7. Answer A is correct. EtherChannel logically bundles multiple physical connections Internet small computer systems interface (iSCSI) can span the entire area of a wide area network (WAN) and is used to encapsulate data into IP packets. In addition, it can be authenticated using either remote authentication dial-in user service (RADIUS) or a terminal access controller access control system plus (TACACS+) server. Fiber channel can transfer data at rates exceeding 100 Mbps and uses Fiber Channel over IP (FCIP) to interconnect storage area network (SAN) islands. Internet small computer systems interface (iSCSI) can span the entire area of a wide area network (WAN) and is used to encapsulate data into IP packets. In addition, it can be authenticated using either remote authentication dial-in user service (RADIUS) or a terminal access controller access control system plus (TACACS+) server. Fiber channel can transfer data at rates exceeding 100 Mbps and uses Fiber Channel over IP (FCIP) to interconnect storage area network (SAN) islands.
8. Answer D is correct. When designing a content networking solution to save significant wide area network (WAN) bandwidth, you should ensure that the content engines have enough storage space to allow between 24 and 72 hours worth of storage space to see a real bandwidth savings.
9. Answer E is correct. The components of a Cisco site-to-site virtual private network (VPN) are as follows:
- IPSec and GRE tunnels - IPSec tunnels transport IP traffic and are restricted to unicasts. GRE tunnels allow for other types of transmissions.
- Cisco head-end VPN routers are internal network routers.
- Cisco VPN access routers are access points from the Internet to the network.
- Internet access provides connectivity to the Internet. Site-to-site VPNs use the Internet to connect over long distances, which is much cheaper than a wide area network (WAN) connection.
10. Answer B is correct. A campus network that incorporates Layer 3 everywhere has the following characteristics:
- ACLs and QoS define domain policies
- Per VLAN and per destination load sharing
- Segment failure domain
- Routing protocol hold-timer convergence
A campus network that incorporates Layer 2 everywhere has the following characteristics:
- ACLs and QoS define domain policies
- Per VLAN load sharing
- VLAN failure domain
- STP convergence
A campus network that incorporates Layer 3 in distribution only has the following characteristics:
- ACLs and QoS define domain policies
- Per VLAN and per destination load sharing
- Access and core failure domain
- Routing protocol hold-timer convergence
A campus network that incorporates Layer 3 in core and distribution has the following characteristics:
- ACLs and QoS define domain policies
- Per VLAN and per destination load sharing
- Access failure domain
- Routing protocol hold-timer convergence
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