CCNA v5 Final Exam 2014

chapter 5 CCNA V5.0 routing and switching 2013 /2014

Thứ Sáu, 27 tháng 12, 2013

chapter 5 routing & switching V5.0

Which statement is true about MAC addresses?

The first three bytes are used by the vendor assigned OUI

What is a characteristic of a contention-based access method?

It is a nondeterministic method

Which two statements describe features or functions of the logical link control sublayer in Ethernet standards? (Choose two.)

Logical link control is implemented in software
The data link layer uses LLC to communicate with the upper layers of the protocol suite

What is the purpose of the preamble in an Ethernet frame?

is used for timing synchronization

What is the Layer 2 multicast MAC address that corresponds to the Layer 3 IPv4 multicast address 224.139.34.56?

01-00-5E-0B-22-38

Which two statements are correct about MAC and IP addresses during data transmission if NAT is not involved? (Choose two.)

Destination and source MAC addresses have local significance and change every time a frame goes from one LAN to another
Destination IP addresses in a packet header remain constant along the entire path to a target host

What are two features of ARP? (Choose two.)
If a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast

If a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply

Refer to the exhibit. PC1 issues an ARP request because it needs to send a packet to PC2. In this scenario, what will happen next?

PC2 will send an ARP reply with its MAC address

A host is trying to send a packet to a device on a remote LAN segment, but there are currently no mappings in its ARP cache. How will the device obtain a destination MAC address?

It will send an ARP request for the MAC address of the default gateway

What are two potential network problems that can result from ARP operation? (Choose two.)

On large networks with low bandwidth, multiple ARP broadcasts could cause data communication delays
Network attackers could manipulate MAC address and IP address mappings in ARP messages with the intent of intercepting network traffic

A network administrator is connecting two modern switches using a straight-through cable. The switches are new and have never been configured. Which three statements are correct about the final result of the connection? (Choose three.)

The link between the switches will work at the fastest speed that is supported by both switches
The link between switches will work as full-duplex
The auto-MDIX feature will configure the interfaces eliminating the need for a crossover cable

A Layer 2 switch is used to switch incoming frames from a 1000BASE-T port to a port connected to a 100Base-T network. Which method of memory buffering would work best for this task?

shared memory buffering

When would a switch record multiple entries for a single switch port in its MAC address table?

when another switch is connected to the switch port

Refer to the exhibit. The exhibit shows a small switched network and the contents of the MAC address table of the switch. PC1 has sent a frame addressed to PC3. What will the switch do with the frame?

The switch will forward the frame to all ports except port 4

Which two statements describe a fixed configuration Ethernet switch? (Choose two.)

A fixed configuration switch may be stackable
The number of ports on the switch cannot be increased

How does adding an Ethernet line card affect the form factor of a switch?

By expanding the port density

A network administrator issues the following commands on a Layer 3 switch:
DLS1(config)# interface f0/3
DLS1(config-if)# no switchport
DLS1(config-if)# ip address 172.16.0.1 255.255.255.0
DLS1(config-if)# no shutdown
DLS1(config-if)# end
What is the administrator configuring?

A routed port

Which address or combination of addresses does a Layer 3 switch use to make forwarding decisions?

MAC and IP addresses

What statement illustrates a drawback of the CSMA/CD access method?

Collisions can decrease network performance

Fill in the blank. The binary number 0000 1010 can be expressed as ______ in hexadecimal.

0A ("zero-a", not the letter o!)

Match...

Field 1 - Preamble
Field 2 - Start Frame Delimiter
Field 3 - Destination MAC Address
Field 4 - Source MAC Address
Field 5 - Length field
Field 6 - Data Field
Field 7 - Frame Check Sequence

Match the characteristic to the forwarding method. (Not all options are used.)
Cut-through:

low latency
may forward runt frames
begins forwarding when the destination address is received

Store and forward:

always stores the entire frame
checks the CRC before forwarding
checks the frame length before forwarding

A store-and-forward switch always stores the entire frame before forwarding, and checks its CRC and frame length. A cut-through switch can forward frames before receiving the destination address field, thus presenting less latency than a store-and-forward switch. Because the frame can begin to be forwarded before it is completely received, the switch may transmit a corrupt or runt frame. All forwarding methods require a Layer 2 switch to forward broadcast frames.

Open the PT Activity. Perform the tasks in the activity instruction and then answer the question.
What destination address will PC1 include in the destination address field of the Ethernet frame that it sends to PC2?

0030.a3e5.0401

chapter 4 CCNA 5 routing and switching 2013 /2014

Thứ Sáu, 27 tháng 12, 2013

chapter 4 routing & switching V5.0

Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?

Data link

Which statement describes signaling at the physical layer?

Sending the signals asynchronously means that they are transmitted without a clock signal.

What are two reasons for physical layer protocols to use frame encoding techniques? (Choose two.)

to distinguish data bits from control bits
to identify where the frame starts and ends

The throughput of a FastEthernet network is 80 Mb/s. The traffic overhead for establishing sessions, acknowledgments, and encapsulation is 15 Mb/s for the same time period. What is the goodput for this network?

65 Mb/s

A network administrator notices that some newly installed Ethernet cabling is carrying corrupt and distorted data signals. The new cabling was installed in the ceiling close to fluorescent lights and electrical equipment. Which two factors may interfere with the copper cabling and result in signal distortion and data corruption? (Choose two.)

How is the magnetic field cancellation effect enhanced in UTP cables?

by increasing and varying the number of twists in each wire pair

Refer to the exhibit. What is wrong with the displayed termination?

The untwisted length of each wire is too long.

Refer to the exhibit. The PC is connected to the console port of the switch. All the other connections are made through FastEthernet links. Which types of UTP cables can be used to connect the devices?

1 - rollover, 2 - straight-through, 3 - crossover

Which statement is correct about multimode fiber?

SC-SC patch cords are used with multimode fiber cables.

What is one advantage of using fiber optic cabling rather than copper cabling?

It is able to carry signals much farther than copper cabling.

Why are two strands of fiber used for a single fiber optic connection?

They allow for full-duplex connectivity.

A network administrator is designing the layout of a new wireless network. Which three areas of concern should be accounted for when building a wireless network? (Choose three.)

Security
Interference
Coverage Area

A network administrator is required to upgrade wireless access to end users in a building. To provide data rates up to 1.3 Gb/s and still be backward compatible with older devices, which wireless standard should be implemented?

802.11ac

What is one main characteristic of the data link layer?

It shields the upper layer protocol from being aware of the physical medium to be used in the communication.

As data travels on the media in a stream of 1s and 0s how does a receiving node identify the beginning and end of a frame?

The transmitting node inserts start and stop bits into the frame.

What is true concerning physical and logical topologies?

Logical topologies determine the media access control method used.

What are two characteristics of 802.11 wireless networks? (Choose two.)

They use CSMA/CA technology.
Collisions can exist in the networks.

What is the purpose of the FCS field in a frame?

to determine if errors occurred in the transmission and reception

Fill in the blank with a number. 10,000,000,000 b/s can also be written as _____ Gb/s.

Fill in the blank. The term _______ indicates the capacity of a medium to carry data and it is typically measured in kilobits per second (kb/s) or megabits per second (Mb/s).

bandwidth

Fill in the blank. What acronym is used to reference the data link sublayer that identifies the network layer protocol encapsulated in the frame?

The physical layer encodes the frames and creates the signals that represent the bits. These signals are then sent on the media one at a time. The destination node physical layer retrieves the individual signals from the media, restores them to their bit representations, and passes the bits up to the data link layer as a complete frame.

Step 1 - not scored -
Step 2
Step 5
Step 3
Step 4

chapter 3 CCNA 5 routing and switching 2013 /2014

Thứ Sáu, 27 tháng 12, 2013

chapter 3 routing & switching V5.0

A computer in a given network is communicating with a specific group of computers. What type of communication is this?

Multicast

What method can be used by two computers to ensure that packets are not dropped because too much data is being sent too quickly?

flow control

Which protocol is responsible for controlling the size and rate of the HTTP messages exchanged between server and client?

A user is viewing an HTML document located on a web server. What protocol segments the messages and manages the segments in the individual conversation between the web server and the web client?

A web client is sending a request for a webpage to a web server. From the perspective of the client, what is the correct order of the protocol stack that is used to prepare the request for transmission?

HTTP, TCP, IP, Ethernet

What are proprietary protocols?

protocols developed by organizations who have control over their definition and operation

Which IEEE standard enables a wireless NIC to connect to a wireless AP that is made by a different manufacturer?

802.11

What is an advantage of network devices using open standard protocols?

A client host and a server running different operating systems can successfully exchange data

What is a function of Layer 4 of the OSI model?

to describe the ordered and reliable delivery of data between source and destination

Which statement is true about the TCP/IP and OSI models?

The TCP/IP transport layer and OSI Layer 4 provide similar services and functions

What is a benefit of using a layered model for network communications?

fostering competition among device and software vendors by enforcing the compatibility of their products

What is the general term that is used to describe a piece of data at any layer of a networking model?

protocol data unit

Which PDU format is used when bits are received from the network medium by the NIC of a host?

Frame

At which layer of the OSI model would a logical address be encapsulated?

Network layer

Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the network?

Segments are sent from the transport layer to the internet layer

What statement describes the function of the Address Resolution Protocol?

ARP is used to discover the MAC address of any host on the local network

Which address provides a unique host address for data communications at the internet layer?

logical address

Which address does a NIC use when deciding whether to accept a frame?

destination MAC address

A user sends an HTTP request to a web server on a remote network. During encapsulation for this request, what information is added to the address field of a frame to indicate the destination?

the MAC address of the default gateway

If the default gateway is configured incorrectly on the host, what is the impact on communications?

The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks

ISO

The International Organization for Standardization In networking, ISO is best known for its Open Systems Interconnection (OSI) reference model. ISO published the OSI reference model in 1984 to develop a layered framework for networking protocols

IANA

The Internet Assigned Numbers Authority department of ICANN responsible for overseeing and managing IP address allocation, domain name management, and protocol identifiers for ICANN

EIA

Is an international standards and trade organization for electronics organizations. It is best known for its standards related to electrical wiring, connectors, and the 19-inch racks used to mount networking equipment

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question. Based on the configured network, what IP address would PC1 and PC2 use as their default gateway?

192.168.1.1

chapter 2 CCNA 5 routing and switching 2013 /2014

Thứ Sáu, 27 tháng 12, 2013

chapter 2 routing & switching V5.0

Which two features are characteristics of flash memory? (Choose two.)

Flash provides nonvolatile storage
The contents of flash may be overwritten

A network administrator is planning an IOS upgrade on several of the head office routers and switches. Which three questions must be answered before continuing with the IOS selection and upgrade? (Choose three.)

What models of routers and switches require upgrades
Do the routers and switches have enough RAM and flash memory for the proposed IOS versions
What features are required for the devices

Which procedure is used to access a Cisco 2960 switch when performing an initial configuration in a secure environment?

Use the console port to locally access the switch from a serial or USB interface of the PC

A network administrator needs to keep the user ID, password, and session contents private when establishing remote CLI connectivity with a switch to manage it. Which access method should be chosen?

A router has a valid operating system and a configuration stored in NVRAM. When the router boots up, which mode will display?

user EXEC mode

Which two functions are provided to users by the context-sensitive help feature of the Cisco IOS CLI? (Choose two.)

displaying a list of all available commands within the current mode
determining which option, keyword, or argument is available for the entered command

Why is it important to configure a hostname on a device?

to identify the device during remote access (SSH or telnet)

Which two characters are allowed as part of the hostname of a Cisco device? (Choose two.)

Numbers
Underline

What is a result of using the service password-encryption command on a Cisco network device?

All passwords in the configuration are not shown in clear text when viewing the configuration

A new network administrator has been asked to enter a banner message on a Cisco device. What is the fastest way a network administrator could test whether the banner is properly configured?

Exit enable mode and press Enter

Passwords can be used to restrict access to all or parts of the Cisco IOS. Select the modes and interfaces that can be protected with passwords. (Choose three.)

VTY interface
console interface
privileged EXEC mode

While trying to solve a network issue, a technician made multiple changes to the current router configuration file. The changes did not solve the problem and were not saved. What action can the technician take to discard the changes and work with the file in NVRAM?

Issue the reload command without saving the running configuration

Which statement is true about the running configuration file in a Cisco IOS device?

It affects the operation of the device immediately when modified

Which interface allows remote management of a Layer 2 switch?

the switch virtual interface

Why would a Layer 2 switch need an IP address?

to enable the switch to be managed remotely

What benefit does DHCP provide to a network?

Hosts can connect to the network and get an IP address without manual configuration

What command can be used on a Windows PC to see the IP configuration of that computer?

ipconfig

What criterion must be followed in the design of an IPv4 addressing scheme for end devices?

Each IP address must be unique within the local network

Refer to the exhibit. A switch was configured as shown. A ping to the default gateway was issued, but the ping was not successful. Other switches in the same network can ping this gateway. What is a possible reason for this?

The no shutdown command was not issued for VLAN 1

What is a user trying to determine when issuing a ping 10.1.1.1 command on a PC?

if there is connectivity with the destination device

Which describes a console port?

It displays startup, debugging, and error messages by default
It can be used to restore an out-of-box configuration on a switch or router

Which describes Virtual Interface?

It uses Telnet or SSH protocols for access
It requires an active network connection

Which describes AUX port:

It connects through dialup connections
It is not supported on Catalyst switch devices

Tab will Completes the remainder of a partially typed command or keyword

Ctrl-R Redisplays, on a new line, the command currently being typed
Ctrl-Z Exits configuration mode and returns to the EXEC
Up Arrow Allows user to scroll backward through former commands
Ctrl-C cancels any command currently being entered and returns directly to privileged EXEC mode
Ctrl-Shift-6 Allows the user to interrupt an IOS process such as ping or traceroute

CCNA 5 Routing & Switching

Thứ Hai, 16 tháng 12, 2013

CCNA v5.0 - Routing and Switching

Cisco CCNA chapter 1

Cisco CCNA chapter 2

Cisco CCNA chapter 3

Cisco CCNA chapter 4

Cisco CCNA chapter 5

Cisco CCNA chapter 6

Cisco CCNA chapter 7

Cisco CCNA chapter 8

Cisco CCNA chapter 9

Cisco CCNA chapter 10

Cisco CCNA chapter 11

~~Cisco~~ CCNA FINAL exam

chapter 1 CCNA 5 routing and switching 2013

Thứ Hai, 16 tháng 12, 2013

What does a DSL do?

splits the access line into three signals

What is the drawback of Dialup telephone?

typically has very low bandwidith

Satellite is a connection that is

not suited for heavily wooded areas

This describes a cable connection

uses coaxial cable as medium

Which device performs the function of determining the path that messages should take through internetworks?

a router

What type of network must a home user access in order to do online shopping?

The Internet

Description of Instant Messaging

real-time communication between two or more people

Description of Social Media

interactive websites where people create and share user-generated content with friends and family

Description of a wiki

web pages that groups of people can edit and view together

Description of a podcast

an audio-based medium that allows people to deliver their recordings to a wide audience

Which statement describes a characteristic of cloud computing?

Applications can be accessed over the Internet through a subscription

Which statement describes a network that supports QoS?

The network provides predictable levels of service to different types of traffic

What is a characteristic of circuit-switched networks?

If all circuits are busy, a new call cannot be placed.

Which two Internet connection options do not require that physical cables be run to the building? (Choose two.)

Satellite
Cellular

What are two functions of intermediary devices on a network? (Choose two.)

They filter the flow of data, based on security settings
They direct data along alternate pathways when there is a link failure

Requiring strong, complex passwords is a practice that supports which network security goal?

ensuring data confidentiality

What two criteria are used to help select network media? (Choose two.)

the environment where the media is to be installed
the distance the media can successfully carry a signal

. Which two Internet solutions provide an always-on, high-bandwidth connection to computers on a LAN? (Choose two.)

DSL
Cable

Fill in the blank. The acronym ________ refers to the trend of end users being able to use their personal devices to access the business network and resources.

BYOD

Which expression accurately defines the term congestion?

a state where the demand on the network resources exceeds the available capacity

Which two statements about the relationship between LANs and WANs are true? (Choose two.)

WANs are typically operated through multiple ISPs, but LANs are typically operated by single organizations or individuals
WANs connect LANs at slower speed bandwidth than LANs connect their internal end devices

Refer to the exhibit. Which set of devices contains only intermediary devices?

A, B, D, G

Which area of the network would a college IT staff most likely have to redesign as a direct result of many students bringing their own tablets and smartphones to school to access school resources?

wireless LAN

Which tool provides real-time video and audio communication over the Internet so that businesses can conduct corporate meetings with participants from several remote locations?