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Exam CCDA - Designing for Cisco Internetwork Solutions
Number 200-310
File Name Designing for Cisco Internetwork Solutions.examskey.200-310.2018-08-01.1e.353q.vcex
Size 5.8 Mb
Posted August 01, 2018
Downloaded 71

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Question 1

Which statement describes the recommended deployment of DNS and DHCP servers in the Cisco Network Architecture for the Enterprise?

  • A: Place the DHCP and DNS servers in the Enterprise Campus Access layer and Enterprise branch.
  • B: Place the DHCP and DNS servers in the Enterprise Campus Server Farm layer and Enterprise branch.
  • C: Place the DHCP server in the Enterprise Campus Core layer and Remote Access_VPN module with the DNS server in the Internet Connectivity module.
  • D: Place the DHCP server in the Enterprise Campus Distribution layer with the DNS server in the Internet Connectivity module.

Correct Answer: B

For the Enterprise Campus, DHCP and internal DNS servers should be located in the Server Farm and they should be redundant. External DNS servers can be placed redundantly at the service provider facility and at the Enterprise branch. 


Question 2

Your company's Cisco routers are operating with EIGRP. You need to join networks with an acquisition's heterogeneous routers at 3 sites, operating with EIGRP and OSPF. 
Which describes the best practice for routing protocol deployment?

  • A: Apply OSPF throughout both networks
  • B: Apply one-way redistribution exclusively at each location
  • C: Apply two-way redistribution exclusively at each location
  • D: Apply two-way redistribution at each location with a route filter at only one location
  • E: Apply two-way redistribution at each location with a route filter at each location
  • F: Apply EIGRP with the same autonomous system throughout both networks

Correct Answer: E

Without filters there is possibility of routing loops. 

Question 3

Which two routing protocols converge most quickly? (Choose two.)

  • A: RIPv1
  • B: RIPv2
  • C: BGP
  • D: OSPF
  • E: EIGRP

Correct Answer: DE

Question 4

Which of these is the equation used to derive a 64 Kbps bit rate?

  • A: 2 x 8 kHz x 4-bit code words
  • B: 8 kHz x 8-bit code words
  • C: 2 x 4-bit code words x 8 kHz
  • D: 2 x 4 kHz x 8-bit code words

Correct Answer: D

While the human ear can sense sounds from 20 to 20, 000 Hz, and speech encompasses sounds from about 200 to 9000 Hz, the telephone channel was designed to operate at about 300 to 3400 Hz. This economical range carries enough fidelity to allow callers to identify the party at the far end and sense their mood. Nyquist decided to extend the digitization to 4000 Hz, to capture higher-frequency sounds that the telephone channel may deliver. Therefore, the highest frequency for voice is 4000 Hz. According to Nyquist theory, we must double the highest frequency, so 2x4kHz = 8kHz. 
Each sample will be encoded into a 8-bit code. Therefore 8kHz x 8-bit code = 64 Kbps (notice about the unit Kbps: 8kHz = 8000 samples per second so 8000 x 8-bit = 64000 bit per second = 64 Kilobit per second = 64 Kbps)
Nyquist theory:
“When sampling a signal (e.g., converting from an analog signal to digital), the sampling frequency must be greater than twice the bandwidth of the input signal in order to be able to reconstruct the original perfectly from the sampled version.”

Question 5

Which one of these statements is an example of how trust and identity management solutions should be deployed in the enterprise campus network?

  • A: Authentication validation should be deployed as close to the data center as possible.
  • B: Use the principle of top-down privilege, which means that each subject should have the privileges that are necessary to perform their defined tasks, as well as all the tasks for those roles below them.
  • C: Mixed ACL rules, using combinations of specific sources and destinations, should be applied as close to the source as possible.
  • D: For ease of management, practice defense in isolation - security mechanisms should be in place one time, in one place.

Correct Answer: C

Validating user authentication should be implemented as close to the source as possible, with an emphasis on strong authentication for access from untrusted networks. Access rules should enforce policy deployed throughout the network with the following guidelines: 
Source-specific rules with any type destinations should be applied as close to the source as possible. 
Destination-specific rules with any type sources should be applied as close to the destination as possible. 
Mixed rules integrating both source and destination should be used as close to the source as possible. 
An integral part of identity and access control deployments is to allow only the necessary access. Highly distributed rules allow for greater granularity and scalability but, unfortunately, increase the management complexity. On the other hand, centralized rule deployment eases management but lacks flexibility and scalability. 
Practicing “defense in depth” by using security mechanisms that back each other up is an important concept to understand. For example, the perimeter Internet routers should use ACLs to filter packets in addition to the firewall inspecting packets at a deeper level. 
Cisco Press CCDA 640-864 Official Certification Guide Fourth Edition, Chapter 13

Question 6

With deterministic Wireless LAN Controller redundancy design, the different options available to the designer have their own strengths. 
Which one of these statements is an example of such a strength?

  • A: Dynamic load balancing, or salt-and-pepper access point design, avoids the potential impact of oversubscription on aggregate network performance.
  • B: N+N redundancy configuration allows logically grouping access points on controllers to minimize intercontroller roaming events.
  • C: N+N+1 redundancy configuration has the least impact to system management because all of the controllers are colocated in an NOC or data center.
  • D: N+1 redundancy configuration uses Layer 3 intercontroller roaming, maintaining traffic on the same subnet for more efficiency.

Correct Answer: B

With such an arrangement there is no complex mesh of access points & controllers. 
N+N WLC Redundancy 
With N+N redundancy, shown in Figure 5-14, an equal number of controllers hack up each other. For example, a pair of WLCs on one floor serves as a backup to a second pair on another floor. The top WLC is primary for API and AP2 and secondary for AP3 and AP4. The bottom WLC is primary for AP3 and AP4 and secondary for API and AP2. There should be enough capacity on each controller to manage a failover situation. 

N+N+1 WLC Redundancy 
With N+N+1 redundancy, shown in Figure 5-15, an equal number of controllers back up each other (as with N+N), plus a backup WLC is configured as the tertiary WLC for the APs. N+N+1 redundancy functions the same as N+N redundancy plus a tertiary controller that backs up the secondary controllers. The tertiary WLC is placed in the data center or network operations center 


Question 7

When designing the threat detection and mitigation portion for the enterprise data center network, which of the following would be the most appropriate solution to consider?

  • A: 802.1X
  • B: ACLs in the core layer
  • C: Cisco Security MARS
  • D: Cisco Firewall Services Module

Correct Answer: C

Question 8

You have a campus network that consists of only Cisco devices. You have been tasked to discover the device platforms, the IOS versions, and an IP address of each device to map the network. Which proprietary protocol will assist you with this task?

  • A: SNMP
  • B: TCP
  • C: CDP
  • D: ICMP
  • E: LLDP

Correct Answer: C

Question 9

Which three technologies are recommended to be used for WAN connectivity in today's Enterprise Edge designs? (Choose three.)

  • A: DWDM
  • B: Metro Ethernet
  • C: Frame Relay
  • E: ISDN
  • F: DSL
  • G: Wireless

Correct Answer: ABD

There is some discussion about whether ISDN not DWDM should be the answer but it does say TODAYS network

Question 10

WAN backup over the Internet is often used to provide primary connection redundancy. 
Which is the most important consideration when passing corporate traffic over the public Internet?

  • A: security
  • B: static versus dynamic routing
  • C: bandwidth
  • D: QoS
  • E: latency

Correct Answer: A

WAN Backup over the Internet 
Another alternative for WAN backup is to use the Internet as the connectivity transport between sites. However, keep in mind that this type of connection does not support bandwidth guarantees. The enterprise also needs to work closely with the ISP to set up the tunnels and advertise the company's networks internally so that remote offices have reachable IP destinations. 
Security is of great importance when you rely on the Internet for network connectivity, so a secure tunnel using IPsec needs to be deployed to protect the data during transport.





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