Free free PassGuide ccna 640-721 exam Download

Exam Number: 640-721
Duration: 90 minutes (65 questions)
Exam Description Introduction
The 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.
Exam Topics
The following information provides general guidelines for the content likely to be included on the Implementing Cisco Unified Wireless Networking Essentials exam. However, other related topics may also appear on any specific delivery of the exam.
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)

QUESTION 46:
DRAG DROP
You work as a network administrator at PassGuide .com.
Your boss, Mrs. PassGuide, is interested in the OSI layers. Match the items with the
appropriate layers. Note that not all options are used.

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Answer:
QUESTION 47:
PassGuide is installing IP phones in a new office. The phones and office computers
connect to the same device. To ensure maximum throughout for the phone data
sessions, the company needs to make sure that the phone traffic is on a different
network from that of the office computer data traffic. What is the best network
device to which to directly connect the phones and computers and what technology
should be implemented on this device? (Choose two)
A. VLAN
B. Subinterface
C. STP
D. Hub
E. Switch
F. Router
G. Wireless Access Point
H. VTP
Answer: A, E
QUESTION 48:

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The corporate head office of PassGuide has a teleconferencing system that uses VOIP
(voice over IP) technology. This system uses UDP as the transport for the data
transmissions. If these UDP datagrams arrive at their destination out of sequence,
what will happen?
A. UDP will send an ICMP Information Request to the source host.
B. UDP will pass the information in the datagrams up to the next OSI layer in the order
that they arrive.
C. UDP will drop the datagrams.
D. UDP will use the sequence numbers in the datagram headers to reassemble the data in
the correct order.
E. UDP will not acknowledge the datagrams and wait for a retransmission of the
datagrams.
Answer: B
Explanation:
VOIP systems utilize UDP because it is faster and uses less overhead. In addition, the
reliable transport mechanism used in TCP is useless to VOIP because if a packet gets
dropped and needs to be resent, it will be already too late.
UDP provides a service for applications to exchange messages. Unlike TCP, UDP is
connectionless and provides no reliability, no windowing, and no reordering of the
received data. However, UDP provides some functions of TCP , such as data transfer,
segmentation, and multiplexing using port numbers, and it does so with fewer bytes of
overhead and with less processing required. UDP data transfer differs from TCP data
transfer in that no reordering or recovery is accomplished. Applications that use UDP are
tolerant of lost data, or they have some application mechanism to recover data loss.
Reference: CCNA Self-Study CCNA INTRO exam certification Guide (Cisco Press,
ISBN 1-58720-094-5) Page 161.
QUESTION 49:
Part of the PassGuide network is shown below:

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You work as a network technician for PassGuide and are responsible for this
network. Based on the diagram shown above, how many collision domains are
there?
A. Six
B. Fourteen
C. Four
D. Two
E. Three
F. One
G. Eight
Answer: D
Explanation:
The multi-segment configuration guidelines apply only to a single Ethernet “collision
domain.” A collision domain is formally defined as a single CSMA/CD network in which
there will be a collision if two computers attached to the system transmit at the same
time. An Ethernet system composed of a single segment or multiple segments linked with
repeaters is a network that functions as a single collision domain.
FIGURE 1 Repeater hubs create a single collision domain
The figure shows two repeater hubs connecting three computers. Since only repeater
connections are used between segments in this network, all of the segments and
computers are in the same collision domain.
In the next figure, the repeaters and DTEs are instead separated by a router (packet
switch) and are therefore in separate collision domains, since routers do not forward
collision signals from one segment to another. Routers contain multiple Ethernet
interfaces and are designed to receive a packet on one Ethernet port and transmit the data
onto another Ethernet port in a new packet.

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FIGURE 2 Routers creates separate collision domains
Instead of propagating collision signals between Ethernet segments, routers interrupt the
collision domain and allow the Ethernets they link to operate independently. Therefore,
you can use packet switching hubs to build larger network systems by interconnecting
individual Ethernet systems.
QUESTION 50:
You work as a network technician at PassGuide .com. You have been assigned the
task of designing a new PassGuide internetwork. The main priority is to achieve the
highest reliability available. PassGuide .com is willing to spend more dollars to avoid
downtime caused by link failure.
Which of the following four designs is to be preferred?

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A. Design PassGuide A
B. Design PassGuide B
C. Design PassGuide C
D. Design PassGuide D
Answer: A

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