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640-721 IUWNE
Implementing Cisco Unified Wireless Networking Essentials
Exam Number: 640-721
Associated Certifications: CCNA Wireless
Duration: 90 minutes (65 questions)
Available Languages: English
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Exam Description IntroductionThe 640-721 IUWNE Implementing Cisco Unified Wireless Network Essential exam is the exam associated with the CCNA Wireless certification. This exam tests a candidate’s knowledge of installing, configuring, operating, and troubleshooting small to medium-size WLANs. Candidates can prepare for this exam by taking the IUWNE Implementing Cisco Unified Wireless Network Essential course.
Describe WLAN fundamentals
Describe basics of spread spectrum technology (modulation, DSS, OFDM, MIMO, Channels reuse and overlap, Rate-shifting, CSMA/CA)
Describe the impact of various wireless technologies (Bluetooth, WiMAX, ZigBee, cordless phone)
Describe wireless regulatory bodies, standards and certifications (FCC, ETSI, 802.11a/b/g/n, WiFi Alliance)
Describe WLAN RF principles (antenna types, RF gain/loss, EIRP, refraction, reflection, ETC)
Describe networking technologies used in wireless (SSID –> WLAN_ID –> Interface — >VLAN, 802.1q trunking)
Describe wireless topologies (IBSS, BSS, ESS, Point-to-Point, Point-to-Multipoint, basic Mesh, bridging)
Describe 802.11 authentication and encryption methods (Open, Shared, 802.1X, EAP, TKIP, AES)
Describe frame types (associated/unassociated, management, control, data)

Install a basic Cisco wireless LAN
Describe the basics of the Cisco Unified Wireless Network architecture (Split MAC, LWAPP, stand-alone AP versus controller-based AP, specific hardware examples)
Describe the Cisco Mobility Express Wireless architecture (Smart Business Communication System — SBCS, Cisco Config Agent — CCA, 526WLC, 521AP – stand-alone and controller-based)
Describe the modes of controller-based AP deployment (local, monitor, HREAP, sniffer, rogue detector, bridge)
Describe controller-based AP discovery and association (OTAP, DHCP, DNS, Master-Controller, Primary-Secondary-Tertiary, n+1 redundancy)
Describe roaming (Layer 2 and Layer 3, intra-controller and inter-controller, mobility groups)
Configure a WLAN controller and access points WLC: ports, interfaces, WLANs, NTP, CLI and Web UI, CLI wizard, LAG AP: Channel, Power
Configure the basics of a stand-alone access point (no lab) (Express setup, basic security)
Describe RRM

Install Wireless Clients
Describe client OS WLAN configuration (Windows, Apple, and Linux.)
Install Cisco ADU
Describe basic CSSC
Describe CCX versions 1 through 5

Implement basic WLAN Security
Describe the general framework of wireless security and security components (authentication, encryption, MFP, IPS)
Describe and configure authentication methods (Guest, PSK, 802.1X, WPA/WPA2 with EAP- TLS, EAP-FAST, PEAP, LEAP)
Describe and configure encryption methods (WPA/WPA2 with TKIP, AES)
Describe and configure the different sources of authentication (PSK, EAP-local or -external, Radius)
Operate basic WCS
Describe key features of WCS and Navigator (versions and licensing)
Install/upgrade WCS and configure basic administration parameters (ports, O/S version, strong passwords, service vs. application)
Configure controllers and APs (using the Configuration tab not templates)
Configure and use maps in the WCS (add campus, building, floor, maps, position AP)
Use the WCS monitor tab and alarm summary to verify the WLAN operations

Conduct basic WLAN Maintenance and Troubleshooting
Identify basic WLAN troubleshooting methods for controllers, access points, and clients methodologies
Describe basic RF deployment considerations related to site survey design of data or VoWLAN applications, Common RF interference sources such as devices, building material, AP location Basic RF site survey design related to channel reuse, signal strength, cell overlap
Describe the use of WLC show, debug and logging
Describe the use of the WCS client troubleshooting tool
Transfer WLC config and O/S using maintenance tools and commands
Describe and differentiate WLC WLAN management access methods (console port, CLI, telnet, ssh, http, https, wired versus wireless management)

Exam Number/Code: 640-721
Exam Name: Implementing Cisco Unified Wireless Networking Essentials (IUWNE)

“Implementing Cisco Unified Wireless Networking Essentials (IUWNE)”, also known as 640-721 exam, is a Cisco certification. With the complete collection of questions and answers Q&as with Expert Explanations, Pass4sure has assembled to take you through 116Q&As to your 640-721 Exam preparation. In the 640-721 exam resources, you will cover every field and category in CCNA helping to ready you for your successful Cisco Certification.

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QUESTION 26:
Refer to the following exhibit:
640-802
Actualtests.com – The Power of Knowing
What data structure is described in the exhibit shown above?
A. IP datagram
B. TCP segment
C. Ethernet frame
D. UDP datagram
E. FDDI frame
F. Token Ring frame
G. None of the above
Answer: B
Explanation:
The Figure below illustrates the fields and overall format of a TCP packet.
Twelve fields comprise a TCP packet.
The following descriptions summarize the TCP packet fields illustrated above.
1. SourcePort and DestinationPort-Identifies points at which upper-layer source and
destination processes receive TCP services.
2.
3. Sequence Number-Usually specifies the number assigned to the first byte of data in the
current message. In the connection-establishment phase, this field also can be used to
identify an initial sequence number to be used in an upcoming transmission.

www.actualtest.org – The Power of Knowing
4.
5. Acknowledgment Number-Contains the sequence number of the next byte of data the
sender of the packet expects to receive.
6.
7. Data Offset-Indicates the number of 32-bit words in the TCP header.
8.
9. Reserved-Remains reserved for future use.
10.
11. Flags-Carries a
variety of control information, including the SYN and ACK bits used for connection
establishment, and the FIN bit used for connection termination.
12.
13. Window-Specifies the size of the sender’s receive window (that is, the buffer space
available for incoming data).
14.
15. Checksum-Indicates whether the header was damaged in transit.
16.
17. Urgent Pointer-Points to the first urgent data byte in the packet.
18.
19. Options-Specifies various TCP options.
Data-Contains upper-layer information.
QUESTION 27:
Network equipment supporting the use of flow control mechanisms has been
recently installed in the PassGuide network. What is the purpose of flow control in a
data network?
A. It ensures that data is retransmitted if an acknowledgment is not received.
B. It reassembles segments in the correct order on the destination device.
C. It provides a mechanism for the receiver to control the transmission speed.
D. It regulates the size of each datagram segment.
E. All of the above are functions of flow control
Answer: C
Explanation:
Flow control paces the transmission of data between a sending device and a receiving
device. Flow control ensures that the receiving device can absorb the data sent to it
before the sending device sends more. When the buffers on the receiving device are full,
a message is sent to the sending device to suspend transmission until the data in the
buffers has been processed.
Incorrect Answers:

www.actualtest.org- The Power of Knowing
A. Data retransmission mechanisms are not handled by control. They are most often
handled by transport layer protocols such as TCP.
B. This describes the reassembly portion of the segmentation and reassembly (SAR)
function of network equipment.
D. The maximum transmission unit (MTU) handles the regulation of maximum frame
sizes.
QUESTION 28:
Part of the PassGuide network is displayed below:
Study the exhibit shown above. Host PassGuide A has established a connection with
the PassGuide II server attached to interface E0 of the PassGuide 2 router. Which of
the following statements describe the information contained in protocol data units
sent from Host PassGuide to PassGuide II? (Choose three)
A. The destination port number in a segment header will have a value of 80
B. The destination IP address of a packet will be the IP address of the E0 interface of the
PassGuide 1 router
C. The destination IP address of a packet will be the IP address of the network interface
of the PassGuide II server
D. The destination address of a frame will be the MAC address of the E0 interface of
PassGuide 1 router
Answer: A, C, D
QUESTION 29:
You have just installed a new web server on the PassGuide network. You are required
to ensure that the web server is accessible from the Internet. The network uses
private addressing, so an IP-to-registered address mapping is required.
To do this, you enter the following command:

www.actualtest.org – The Power of Knowing
PassGuide (config)# ip nat inside source static 192.168.2.1
198.18.1.254
You unsuccessfully try to ping the Internet from a PC host on the LAN. During the
troubleshooting process, you enter the “show ip nat translations” command but the
output is blank.
What is the most likely cause of the problem?
A. The keyword overload is missing from the command.
B. The NAT pool must be defined first.
C. An access list must be defined to create static NAT translations.
D. The interfaces must be configured for NAT.
E. None of the above
Answer: D
Explanation:
In order to successfully configure a static NAT translation, the interfaces must be
configured for NAT, in addition to the global NAT command that was entered. The
router interface that lies on the inside part of the network must be defined using the “ip
nat inside” command. Similarly, the WAN interface that is being used for the Internet
connection must be defined using the “ip nat outside” command.
Incorrect Answers:
A. In order to make an internal server reachable from the Internet, a static one to one
NAT entry must be configured for the server. The keyword “overload” is used to
configure many to one NAT, or PAT.
B, C. This need not be done in order to create a static NAT entry. These steps are
typically done in setting up NAT so that inside LAN users can access the Internet via
NAT.
QUESTION 30:
Which protocol below uses TCP port 443 at layer 4?
A. HTML
B. HTTPS
C. TFTP
D. Telnet
E. SMTP
F. None of the above
Answer: B

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