CH2 - Network Design Models - Q&A

What are four benefits of hierarchical network design?

1. Cost savings 2. Ease of understanding 3. Eeasy network growth (scalability) 4. Improved fault isolation.

How many links are required for a full mesh of six sites?

15 Use n(n-1)/2 n = 6. 6(6−1)/2 = (6 * 5)/2 = 30/2 = 15.

How many full-mesh links do you need for a network with ten routers?

45 Use the formula n(n−1)/2 n = 10. 10(10−1)/2 = 90/2 = 45 links.

The Cisco Enterprise Architecture takes which approach to network design? a. It takes a functional modular approach. b. It takes a sectional modular approach. c. It takes a hierarchical modular approach. d. It takes a regional modular approach.

A

Which is a benefit of using network modules for network design? a. Network availability increases. b. Network becomes more secure. c. Network becomes more scalable. d. Network redundancy is higher.

C

Which layer performs Active Directory and messaging? a. Core layer b. Distribution layer c. Access layer d. Application layer

D

Which topology allows for maximum growth? a. Triangles b. Collapsed core-distribution c. Full mesh d. Core-distribution-access

D

Which of the following describe the access layer? *(Select two.)* a. High-speed data transport b. Applies network policies c. Performs network aggregation d. Concentrates user access e. Provides PoE f. Avoids data manipulation

D and E. The access layer concentrates user access and provides PoE to IP phones.

Which enterprise edge submodule connects to an ISP?

The Internet submodule.

True or false: HSRP provides router redundancy.

True

True or false: In the Cisco Enterprise Architecture model, the network management submodule does not manage the SP edge.

True

True or false: The access layer provides high availability and port security.

True

Which are two benefits of using a modular approach? a. Simplifies the network design b. Reduces the amount of network traffic on the network c. Often reduces the cost and complexity of the network d. Makes the network simple by using full mesh topologies

A and C.

Which of the following describe the core layer? *(Select two.)* a. High-speed data transport b. Applies network policies c. Performs network aggregation d. Concentrates user access e. Provides PoE f. Avoids data manipulation

A and F. The core layer provides high-speed data transport without manipulating the data.

Which layers perform redundancy? *(Select two.)* a. Core layer b. Distribution layer c. Access layer d. Data Link Layer

A, B

Which are key features of the distribution layer? *(Select three.)* a. Aggregates access layer switches b. Provides a routing boundary between access and core layers c. Provides connectivity to end devices d. Provides fast switching e. Provides transport to the enterprise edge f. Provides VPN termination

A, B, and C.

Which three types of servers are placed in the e-commerce submodule? a. Web b. Application c. Database d. Intranet e. Internet f. Public share

A, B, and C. Web, application, and database servers are placed in the e-commerce submodule.

Which three modules provide infrastructure for remote users? *(Select three.)* a. Teleworker module b. WAN module c. Enterprise branch module d. Campus module e. Enterprise data center f. Core, distribution, access layers

A, C, and E. The teleworker, branch, and data center modules are part of the enterprise remote modules.

Which of the following is an SP edge module in the Cisco Enterprise Architecture model? a. Public switched telephone network (PSTN) service b. Edge distribution c. Server farm d. Core layer

A. The SP edge includes Internet, PSTN, and WAN modules.

Which of the following describe the distribution layer? *(Select two.)* a. High-speed data transport b. Applies network policies c. Performs network aggregation d. Concentrates user access e. Provides PoE f. Avoids data manipulation

B and C. The distribution layer concentrates the network access switches and routers and applies network policies with access lists.

Which are borderless networks infrastructure services? *(Select three.)* a. IP telephony b. Security c. QoS d. SP edge e. High availability f. Routing

B, C, and E. Security, QoS, and high availability are borderless network infrastructure services.

Which topology is best used for connectivity in the building distribution layer? a. Full mesh b. Partial mesh c. Hub and spoke d. Dual ring e. EtherChannel

B. Partial-mesh connectivity is best suited for the distribution layer.

Which submodule contains firewalls, VPN concentrators, and ASAs? a. WAN b. VPN/remote access c. Internet d. Server farm

B. The VPN/remote access submodule contains firewalls, VPN concentrators, and ASAs.

In the hierarchical network model, which layer is responsible for fast transport? a. Network layer b. Core layer c. Distribution layer d. Access layer

B. The core layer of the hierarchical model is responsible for fast transport.

Which layer provides routing between VLANs and security filtering? a. Access layer b. Distribution layer c. Enterprise edge d. WAN module

B. The distribution layer provides routing between VLANs and security filtering.

Which is the recommended design geometry for routed networks? a. Design linear point-to-point networks b. Design in rectangular networks c. Design in triangular networks d. Design in circular networks

C

Which layer performs port security and DHCP snooping? a. Core layer b. Distribution layer c. Access layer d. Application layer

C

Which layer performs rate limiting, network access control, and broadcast suppression? a. Core layer b. Distribution layer c. Access layer d. Data link layer

C

Which module or layer connects the server layer to the enterprise edge? a. Campus distribution layer b. Campus data center access layer c. Campus core layer d. Campus MAN module e. WAN module f. Internet connectivity module

C

Which server type is used in the Internet connectivity module? a. Corporate b. Private c. Public d. Internal e. Database f. Application

C

In which module would you place Cisco Unified Communications Manager (CUCM)? a. Campus core b. E-commerce c. Server farm d. Edge distribution farm

C. The server farm hosts campus servers, including Cisco CallManager servers

Which of the following is (are) a method (methods) of workstation-to-router redundancy in the access layer? a. AppleTalk Address Resolution Protocol (AARP) b. Hot Standby Router Protocol (HSRP) c. Virtual Router Redundancy Protocol (VRRP) d. Answers b and c e. Answers a, b, and c

D. HSRP and VRRP provide default gateway redundancy.

High availability, port security, and rate limiting are functions of which hierarchical layer? a. Network layer b. Core layer c. Distribution layer d. Access layer

D. The access layer functions are high availability, port security, rate limiting, ARP inspection, virtual access lists, and trust classification.

Which remote module connects to the enterprise via the Internet or WAN submodules and contains a small LAN switch for users? a. SP edge b. WAN submodule c. Building distribution d. Campus core e. Enterprise branch f. Enterprise data center

E. The infrastructure at the remote site usually consists of a WAN router and a small LAN switch.

To what enterprise edge submodule does the SP edge Internet submodule connect?

Enterprise edge Internet submodule.

The network-management module has tie-ins to which component(s)? a. Campus infrastructure b. Server farm c. Enterprise edge d. SP edge e. Answers a and b f. Answers a, b, and c g. Answers a, b, c, and d

F. The network management module monitors all components and functions except for the SP edge.

True or false: The core layer of the hierarchical model does security filtering and media translation.

False

True or false: You can implement a full-mesh network to increase redundancy and reduce a WAN's costs.

False. A full-mesh network increases costs.

True or false: Small-to-medium campus networks must always implement three layers of hierarchical design.

False. Small campus networks can have collapsed core and distribution layers and implement a two-layer design. Medium campus networks can have two-tier or three-tier designs.

List the components of the Internet edge.

Firewalls, Internet routers, FTP/HTTP servers, SMTP mail servers, and DNS servers.

Match the redundant model with its description: i. Workstation-router redundancy ii. Server redundancy iii. Route redundancy iv. Media redundancy a. Cheap when implemented in the LAN and critical for the WAN. b. Provides load balancing. c. Host has multiple gateways. d. Data is replicated.

i = C, ii = D, iii = B, iv = A.

In which ways does application network services help resolve application issues? *(Choose two.)* a. It can compress, cache, and optimize content. b. Optimizes web streams, which can reduce latency and offload the web server. c. Having multiple data centers increases productivity. d. Improves application response times by using faster servers.

A and B.

What are two ways that wireless access points are used? *(Choose two.)* a. Function as a hub for wireless end devices b. Connect to the enterprise network c. Function as a Layer 3 switch for wireless end devices d. Provide physical connectivity for wireless end devices e. Filter out interference from microwave devices

A and B. Wireless APs function as a hub to connect wireless end devices to the network.

Which layer performs routing between VLANs, filtering, and load balancing? a. Core layer b. Distribution layer c. Access layer d. Application layer

B

Which statement is true regarding hierarchical network design? a. Makes the network harder since there are many submodules to use b. Provides better performance and network scalability c. Prepares the network for IPv6 migration from IPv4 d. Secures the network with access filters in all layers

B

You need to design for a packet load-sharing between a group of redundant routers. Which protocol allows you to do this? a. HSRP b. GLBP c. VRRP d. AARP

B

Which Cisco solution allows a pair of switches to act as a single logical switch? a. HSRP b. VSS c. STP d. GLB

B. VSS allows a Catalyst 6500 or 6800 switch pair to act as a single logical switch.

Which are submodules of the enterprise campus module? *(Select two.)* a. WAN b. LAN c. Server farm/data center d. Enterprise branch e. VPN f. Building distribution

C and F.

Which are the three layers of the hierarchical model? *(Select three.)* a. WAN layer b. LAN layer c. Core layer d. Aggregation layer e. Access layer f. Distribution layer g. Edge layer

C, E, and F.

Which module contains devices that supports AAA and stores passwords? a. WAN module b. VPN module c. Server farm module d. Internet connectivity module e. SP edge f. TACACS

C. Servers are located in the server farm module of the enterprise campus area.

Which solution supports the enterprise teleworker? a. IP telephony b. Enterprise campus c. Cisco Virtual Office d. SP edge e. Hierarchical design f. Data Center 3.0

C. The Cisco Virtual Office supports the teleworker with router, VPN, and IP telephony.

In the hierarchical network model, at which layer do security filtering, address aggregation, and media translation occur? a. Network layer b. Core layer c. Distribution layer d. Access layer

C. The distribution layer of the hierarchical model is responsible for security filtering, address and area aggregation, and media translation.

Which Enterprise Architecture model component interfaces with the service provider (SP)? a. Campus infrastructure b. Access layer c. Enterprise edge d. Edge distribution

C. The enterprise edge consists of e-commerce, Internet connectivity, VPN/remote access, and WAN modules. The enterprise edge modules connect to SPs.

Which campus submodule connects to the enterprise edge module? a. SP edge b. WAN submodule c. Building distribution d. Campus core e. Enterprise branch f. Enterprise data center

D. The campus core connects to the server farm, the enterprise edge, and the building distribution.

Which server types are used in the e-commerce module for users running applications and storing data? *(Select three.)* a. Corporate b. Private c. Public d. Internet e. Database f. Application g. Web

E, F, and G.

List the four modules of the enterprise edge area.

E-commerce, Internet, VPN/remote access, and WAN.

List the six modules of the Cisco Enterprise Architecture model for network design.

Enterprise campus, enterprise edge, enterprise WAN, enterprise branch, enterprise data center, and enterprise teleworker.

In an IP telephony network, in which submodule or layer are the IP phones and CUCM servers located?

IP phones reside in the building access layer of the campus infrastructure. The CallManagers are placed in the server farm of the enterprise campus.

List the three submodules of the SP edge.

Internet services, WAN services, and PSTN services.

List and describe four options for multihoming to the SP between the enterprise edge and the SP edge. Which option provides the most redundancy?

Option 1: Single router, dual links to one ISP. Option 2: Single router, dual links to two ISPs. Option 3: Dual routers, dual links to one ISP. Option 4: Dual routers, dual links to two ISPs. Option 4 provides the most redundancy, with dual local routers, dual links, and dual ISPs.

You add Communications Manager to the network as part of a Voice over IP (VoIP) solution. In which submodule of the Enterprise Architecture model should you place Communications Manager?

The server farm