CCNA Discovery 4 Chapter 1

1. What are two mechanisms that provide redundancy for server farm implementations? (Choose two.)
   host intrusion prevention systems
   virtual private networks
   network intrusion prevention systems
   Rapid Spanning Tree Protocol
   Hot Standby Routing Protocol

2. The ability to connect securely to a private network over a public network is provided by which WAN technology?
   Frame Relay

3. Which three statements describe the functions of the Cisco hierarchical network design model? (Choose three.)
   Route summarization is not necessary at the core and distribution layers.
   The distribution layer is responsible for traffic filtering and isolating failures from the core.
   Two goals of the core layer are 100 percent uptime and maximizing throughput.
   The access layer provides a means of connecting end devices to the network.

   The distribution layer distributes network traffic directly to end users.
   The core layer usually employs a star topology.

4. A network designer is creating a new network. The design must offer enough redundancy to provide protection against a single link or device failure, yet must not be too complex or expensive to implement. What topology would fill these needs?
   full mesh
   partial mesh
   extended star
   hub and spoke

5. Refer to the exhibit. If the firewall module has been correctly configured using best practices for network security, which statement is true about the security design for the network?
   Servers in the network are not protected from internal attacks.
   Servers in the DMZ are protected from internal and external attacks.
   Servers in the server farm are protected from internal and external attacks.
   Traffic from the external networks is not able to access the servers in the DMZ.

6. Which statement is true about a DMZ in a traditional network firewall design?
   A DMZ is designed to provide service for external access but not for internal access.
   Servers in the DMZ provide limited information that can be accessed from external networks.
   User access to the DMZ from the Internet and the internal network usually is treated the same way.
   All servers in the enterprise network should be located in a DMZ because of enhanced security measures.

7. What network connection would be most cost efficient while still meeting the security and connectivity needs of this teleworker?
   dedicated leased line connection with a dialup backup link
   Frame Relay connection with a DSL backup link
   DSL VPN connection with a dialup backup link
   ATM connection with a DSL VPN backup link
   DSL connection with no backup link

8. Refer to the exhibit. The network administrator creates a standard access control list to prohibit traffic from the network from reaching the network while still permitting Internet access for all networks. On which router interface and in which direction should it be applied?
   interface fa0/0, inbound
   interface fa0/0, outbound
   interface fa0/1, inbound
   interface fa0/1, outbound

9. Refer to the exhibit. The server broadcasts an ARP request for the MAC address of its default gateway. If STP is not enabled, what is the result of this ARP request?
   Router_1 contains the broadcast and replies with the MAC address of the next-hop router.
   Switch_A replies with the MAC address of the Router_1 E0 interface.
   Switch_A and Switch_B continuously flood the message onto the network.
   Switch_B forwards the broadcast request and replies with the Router_1 address.

10. What are two best practices in wireless LAN design to ensure secure wireless access to the corporate network? (Choose two.)
   Configure APs for broadcast SSID.
   Place APs as far apart as possible.
   Use a separate WLAN for employees.
   Configure WPA.

   Use wireless routers in all IDFs.

11. In a well-designed, high-availability network, which device significantly affects the most users if a failure occurs?
   desktop PC of the user
   large switch in the network core layer
   large switch in the network distribution layer
   small workgroup switch in the network access layer

12. Which two statements are true regarding network convergence? (Choose two.)
   In a large network, using the EIGRP or OSPF routing protocols rather than RIPv2 may improve convergence time.
 Using STP at the core layer improves convergence time by allowing the use of redundant links between devices.
   Route summarization improves convergence time by minimizing the size of the routing table.
   A full mesh topology improves convergence time by allowing load balancing.
   ACLs can be configured to improve convergence time.

13. Centralizing servers in a data center server farm can provide which benefit over a distributed server environment?
   It keeps client-to-server traffic local to a single subnet.
   Servers located in a data center require less bandwidth.
   It is easier to filter and prioritize traffic to and from the data center.
   Server farms are not subject to denial of service attacks.

14. Refer to the exhibit. What effect does the ACL shown have on network traffic, assuming that it is correctly applied to the interface?
   All traffic to network is denied.
   All TCP traffic is denied to and from network
   All Telnet traffic from the network to any destination is denied.
   All port 23 traffic to the network is denied.
   All traffic from the network is denied to any other network.

15. Which Cisco IOS function can be configured at the distribution layer to filter unwanted traffic and provide traffic management?
   virus protection
   spyware protection
   access control lists

16. What kind of ACL inspects outbound UDP, TCP, and ICMP traffic and allows inbound access only to traffic that belongs to these established sessions?
   dynamic ACL
   time-based ACL
   reflexive ACL
   lock and key ACL

17. Which three functions are performed at the distribution layer of the hierarchical network model? (Choose three.)
   summarizing routes from the access layer
   allowing end users to access the local network
   providing the gateway of last resort for core layer devices
   preserving bandwidth at the access layer by filtering network functions
   isolating network problems to prevent them from affecting the core layer
   utilizing redundant links for load balancing to increase available bandwidth

18. Refer to the exhibit. Which two devices are part of the access design layer? (Choose two.)

19. What is true about implementing a centralized server farm topology?
   requires direct cabling from the MPOE to enhance the performance of servers
   requires the addition of high-capacity switches to each workgroup
   provides defined entry and exit points so that filtering and securing traffic is easier
   allows for placement of workgroup servers at the access layer

20. Refer to the exhibit. What happens when Host 1 attempts to send data?
   Frames from Host 1 are dropped, but no other action is taken.
   Frames from Host 1 cause the interface to shut down, and a log message is sent.
   Frames from Host 1 are forwarded, but a log message is sent.
   Frames from Host 1 are forwarded, and the mac-address table is updated.

21. Which two considerations are valid when designing access layer security?(Choose two.)
   In a large wireless network, the most efficient method to secure the WLAN is MAC address filtering.
   DoS attacks are normally launched against end-user PCs and can be mitigated by installing personal firewalls on all company PCs.
   SSH is more secure than Telnet to administer network devices.
   Disabling unused ports on the switches helps prevent unauthorized access to the network.

   All Telnet passwords are at least 6 characters long.

22. What address can be used to summarize only networks,,, and

23. Which two items in a physical WLAN design can be identified through a site survey? (Choose two.)
   the types of antennas that are required
   the encryption techniques that are required
   the access point hardware that is required
   the different levels of access that are required
   the connection reliability that is required

24. Refer to the exhibit. Which two statements correctly describe the benefits of the network access layer design that is shown? (Choose two.)
   If host A sends a broadcast message, only hosts in VLAN10 receive the broadcast frame.
   If host A attempts to transmit data at the same time as another host, only hosts in VLAN10 are affected by the collision.
   Segmenting all voice traffic on a separate VLAN facilitates the implementation of QoS.
   VLANs improve network performance by facilitating the use of route summarization.
   VLANs at the access layer help guarantee network availability by facilitating load balancing.

25. What are three ways to ensure that an unwanted user does not connect to a wireless network and view the data? (Choose three.)
   Disable SSID broadcasting.
   Configure filters to restrict IP addresses.
   Use authentication between clients and the wireless device.
   Use NetBIOS name filtering between clients and the wireless device.
   Configure strong encryption such as WPA.
 Use a WEP compression method.

26 The network administrator is designing network connectivity for a home teleworker. The teleworker needs secure access to download and upload documents on the network file server. What network connection would be most cost efficient while still meeting the security and connectivity needs of this teleworker?
   dedicated leased line connection with a dialup backup link
   Frame Relay connection with a DSL backup link
   DSL VPN connection with a dialup backup link
   ATM connection with a DSL VPN backup link
DSL connection with no backup link

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