Rob Drysdale

I wanted to wait to post anymore tests until I had the new site running, but I have more than few people asking for the remainding tests.  So, just to keep my inbox clean I’m going to get these tests posted.  Now that I’m posting these again please spend some time studying the chapters, because I absolutely will not post the final exam.  Please don’t email asking for me to send you tests.  I simlply will not email anyone any test answers.  Everything I do will be online for everyone to use.  Finally, don’t write to me asking for the final exam.  I am tired of answering these messages when I have stated very clearly that I will not post the final, and I will delete any messages asking for the final.

Which OSI layer is responsible for binary transmission, cable specification, and physical aspects of network communication?

Presentation
Transport
Data Link
Physical

An installed fiber run can be checked for faults, integrity, and the performance of the media by using what device?

light injector
OTDR
TDR
multimeter

Which characteristics describe fiber optic cable? (Choose two.)

It is not affected by EMI or RFI.
Each pair of cables is wrapped in metallic foil.
It combines the technique of cancellation, shielding and twisting to protect data.
It has a maximum speed of 100 Mbps.
It is the most expensive type of LAN cabling.

When is a straight-through cable used in a network?

when connecting a router through the console port
when connecting one switch to another switch
when connecting a host to a switch
when connecting a router to another router

Refer to the exhibit. Which type of Category 5 cable is used to make an Ethernet connection between Host A and Host B?

coax cable
rollover cable
crossover cable
straight-through cable

Which method of signal transmission uses radio waves to carry signals?

electrical
optical
wireless
acoustic

In most business LANs, which connector is used with twisted-pair networking cable?

BNC
RJ-11
RJ-45
Type F

Which of the following is a characteristic of single-mode fiber-optic cable?

generally uses LEDs as the light source
relatively larger core with multiple light paths
less expensive than multimode
generally uses lasers as the light source

Which type of cable run is most often associated with fiber-optic cable?

backbone cable
horizontal cable
patch cable
work area cable

What are three measures of data transfer? (Choose three.)

goodput
frequency
amplitude
throughput
crosstalk
bandwidth

With the use of unshielded twisted-pair copper wire in a network, what causes crosstalk within the cable pairs?

the magnetic field around the adjacent pairs of wire
the use of braided wire to shield the adjacent wire pairs
the reflection of the electrical wave back from the far end of the cable
the collision caused by two nodes trying to use the media simultaneously

What is a primary role of the Physical layer in transmitting data on the network?

create the signals that represent the bits in each frame on to the media
provide physical addressing to the devices
determine the path packets take through the network
control data access to the media

In LAN installations where potential electrical hazards or electromagnetic interference may be present, what type of media is recommended for backbone cabling?

coax
fiber
Cat5e UTP
Cat6 UTP
STP

What is a possible effect of improperly applying a connector to a network cable?

Data will be forwarded to the wrong node.
Data transmitted through that cable may experience signal loss.
An improper signaling method will be implemented for data transmitted on that cable.
The encoding method for data sent on that cable will change to compensate for the improper connection.

Which fiber connector supports full duplex Ethernet?

What is considered a benefit of wireless as a media choice?

more host mobility
lower security risks
reduced susceptibility to interference
less impact of the surroundings on the effective coverage area

What characteristic of UTP cable helps reduce the effects of interference?

the metal braiding in the shielding
the reflective cladding around core
the twisting of the wires in the cable
the insulating material in the outer jacket

It seems that some of you are really eager to see the remainder of the tests.  I just want to remind everyone that the final exam will not be posted.  I only managed to score 73% on the final, and I actully studied the chapters.  Remember that when it comes time to take the final exam.

Which three factors should be considered when implementing a Layer 2 protocol in a network? (Choose three.)

the Layer 3 protocol selected
the geographic scope of the network
the PDU defined by the transport layer
the physical layer implementation
the number of hosts to be interconnected

Refer to the exhibit. Assuming that the network in the exhibit is converged meaning the routing tables and ARP tables are complete, which MAC address will Host A place in the destination address field of Ethernet frames destined for www.server?

00-1c-41-ab-c0-00
00-0c-85-cf-65-c0
00-0c-85-cf-65-c1
00-12-3f-32-05-af

Which options are properties of contention-based media access for a shared media? (Choose three.)

non-deterministic
less overhead
one station transmits at a time
collisions exist
devices must wait their turn
token passing

What is true concerning physical and logical topologies?

The logical topology is always the same as the physical topology.
Physical topologies are concerned with how a network transfers frames.
Physical signal paths are defined by Data Link layer protocols.
Logical topologies consist of virtual connections between nodes.

What determines the method of media access control? (Choose two.)

network layer addressing
media sharing
application processes
logical topology
intermediary device function

What is true regarding media access control? (Choose three.)

Ethernet utilizes CSMA/CD
defined as placement of data frames on the media
contention-based access is also known as deterministic
802.11 utilizes CSMA/CD
Data Link layer protocols define the rules for access to different media
controlled access contains data collisions

Which statements describe the logical token-passing topology? (Choose two.)

Network usage is on a first come, first serve basis.
Computers are allowed to transmit data only when they possess a token.
Data from a host is received by all other hosts.
Electronic tokens are passed sequentially to each other.
Token passing networks have problems with high collision rates.

A network administrator has been asked to provide a graphic representation of exactly where the company network wiring and equipment are located in the building. What is this type of drawing?

logical topology
physical topology
cable path
wiring grid
access topology

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

is used as a padding for data
is used for timing synchronization
is used to identify the source address
is used to identify the destination address

What statements are true regarding addresses found at each layer of the OSI model? (Choose two.)

Layer 2 may identify devices by a physical address burned into the network card
Layer 2 identifies the applications that are communicating
Layer 3 represents a hierarchical addressing scheme
Layer 4 directs communication to the proper destination network
Layer 4 addresses are used by intermediary devices to forward data

Refer to the exhibit. Which statement describes the media access control methods that are used by the networks in the exhibit?

All three networks use CSMA/CA
None of the networks require media access control.
Network 1 uses CSMA/CD and Network 3 uses CSMA/CA.
Network 1 uses CSMA/CA and Network 2 uses CSMA/CD.
Network 2 uses CSMA/CA and Network 3 uses CSMA/CD.

Refer to the exhibit. How many CRC calculations will take place as traffic routes from the PC to the laptop?

1
2
4
6
8
16

Refer to the exhibit. A frame is being sent from the PC to the laptop. Which source MAC and IP addresses will be included in the frame as it leaves RouterB? (Choose two.)

source MAC - PC
source MAC - S0/0 on RouterA
source MAC - Fa0/1 on RouterB
source IP - PC
source IP - S0/0 on RouterA
source IP - Fa0/1 of RouterB

Which sublayer of the data link layer prepares a signal to be transmitted at the physical layer?

LLC
MAC
HDLC
NIC

What two facts are true when a device is moved from one network or subnet to another? (Choose two.)

The Layer 2 address must be reassigned.
The default gateway address should not be changed.
The device will still operate at the same Layer 2 address.
Applications and services will need additional port numbers assigned.
The Layer 3 address must be reassigned to allow communications to the new network.

What is a function of the data link layer?

provides the formatting of data
provides end-to-end delivery of data between hosts
provides delivery of data between two applications
provides for the exchange data over a common local media

What is a characteristic of a logical point-to-point topology?

The nodes are physically connected.
The physical arrangement of the nodes is restricted.
The media access control protocol can be very simple.
The data link layer protocol used over the link requires a large frame header.

What is a primary purpose of encapsulating packets into frames?

provide routes across the internetwork
format the data for presentation to the user
facilitate the entry and exit of data on media
identify the services to which transported data is associated

What is the primary purpose of the trailer in a data link layer frame?

define the logical topology
provide media access control
support frame error detection
carry routing information for the frame

What are three characteristics of valid Ethernet Layer 2 addresses? (Choose three.)

They are 48 binary bits in length.
They are considered physical addresses.
They are generally represented in hexadecimal format.
They consist of four eight-bit octets of binary numbers.
They are used to determine the data path through the network.
They must be changed when an Ethernet device is added or moved within the network.

I’m a little dissapointed by the lack of duscussion around this series of posts.  I’m glad to be able to help people pass the chapter tests by posting this information, but I would really like to see more discussion about networking.  Most of this is pretty basic stuff covering the OSI model and TCP/IP layers, but everyone has to start somewhere.  Before I took this class I knew nothing about networking.  Let’s work together to create a place where everyone can learn about networking.

In an IPv4 environment, what information is used by the router to forward data packets from one interface of a router to another?

destination network address
source network address
source MAC address
well known port destination address

What information is added during encapsulation at OSI Layer 3?

source and destination MAC
source and destination application protocol
source and destination port number
source and destination IP address

In a connectionless system, which of the following is correct?

The destination is contacted before a packet is sent.
The destination is not contacted before a packet is sent.
The destination sends an acknowledgement to the source that indicates the packet was received.
The destination sends an acknowledgement to the source that requests the next packet to be sent.

Which IP packet field will prevent endless loops?

type-of-service
identification
flags
time-to-live
header checksum

Which portion of the network layer address does a router use to forward packets?
host portion
broadcast address
network portion
gateway address

Refer to the exhibit. Using the network in the exhibit, what would be the default gateway address for host A in the 192.133.219.0 network?

192.135.250.1
192.31.7.1
192.133.219.0
192.133.219.1

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

The host is unable to communicate on the local network.
The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks.
The host can communicate with other hosts on remote networks, but is unable to communicate with hosts on the local network.
There is no impact on communications.

What is the purpose of a default gateway?

physically connects a computer to a network
provides a permanent address to a computer
identifies the network to which a computer is connected
identifies the logical address of a networked computer and uniquely identifies it to the rest of the network
identifies the device that allows local network computers to communicate with devices on other networks

What type of routing uses information that is manually entered into the routing table?

dynamic
interior
static
standard

When the destination network is not listed in the routing table of a Cisco router, what are two possible actions that the router might take? (Choose two.)

The router sends an ARP request to determine the required next hop address.
The router discards the packet.
The router forwards the packet toward the next hop indicated in the ARP table.
The router forwards the packet to the interface indicated by the source address.
The router forwards the packet out the interface indicated by the default route entry.

What are the key factors to consider when grouping hosts into a common network? (Choose three.)

gateways
purpose
physical addressing
software version
geographic location
ownership

What is a component of a routing table entry?

the MAC address of the interface of the router
the destination Layer 4 port number
the destination host address
the next-hop address

Which intermediary devices could be used to implement security between networks? (Choose two.)

router
hub
switch
firewall
access point
bridge

What are three common problems with a large network? (Choose three.)

too few broadcasts
performance degradation
security issues
limited management responsibility
host identification
protocol compatibility

Refer to the exhibit. All devices shown in the exhibit have factory default settings. How many broadcast domains are represented in the topology that is shown?

3
4
5
7
8
11

Which three statements are true about routes and their use? (Choose three.)

If no route to the destination network is found, the packet is returned to the previous router.
If the destination network is directly connected, the router forwards the packet to the destination host.
If multiple network entries exist for the destination network, the most general route is used to forward the packet.
If no route exists for the destination network and a default route is present, the packet is forwarded to the next-hop router.
If the originating host has a default gateway configured, the packet for a remote network can be forwarded using that route.
If a host does not have a route manually configured for the destination network, the host will drop the packet.

Refer to the exhibit. A network administrator is troubleshooting a connectivity problem and needs to determine the address that is used to forward network packets out the network. Using the netstat -r command, the administrator would identify which address as the address to which all hosts send packets that are destined for an outside network?

10.10.10.26
127.0.0.1
10.10.10.6
10.10.10.1
224.0.0.0

Refer to the exhibit. A network administrator notices that there are too many broadcasts on the network. What two steps can the network administrator take to resolve this problem? (Choose two.)

Replace S2 with a router.
Place all servers on S1.
Disable TCP/IP broadcasts.
Subnet the 192.168.0.0 /24 network.
Disable all unused interfaces on the switches.

Refer to the exhibit. The network in the exhibit is fully operational. What two statements correctly describe the routing for the topology that is shown? (Choose two.)

192.168.0.2 is the next-hop address that is used by R3 to route a packet from the 10.0.0.0 network to the 172.16.0.0 network.
10.0.0.1 is the next-hop address that is used by R1 to route a packet from the 192.168.12.0 network to the 10.0.0.0 network.
192.168.0.1 is the next-hop address that is used by R1 to route a packet from the 192.168.12.0 network to the 172.16.0.0 network.
172.16.0.1 is the next-hop address that is used by R3 to route a packet from the 10.0.0.0 to the 172.16.0.0 network.
192.168.0.1 is the next-hop address that is used by R2 to route a packet from the 172.16.0.0 network to the 192.168.12.0 network.
192.168.0.2 is the next-hop address that is used by R2 to route a packet from the 172.16.0.0 network to the 192.168.12.0 network.

What two characteristics are commonly associated with dynamic routing protocols? (Choose two.)

require no device configuration
provide routers with up-to-date routing tables
require less processing power than static routes require
consume bandwidth to exchange route information
prevent manual configuration and maintenance of the routing table

What statement describes the purpose of a default route?

A host uses a default route to transfer data to another host on the same network segment.
A host uses a default route to forward data to the local switch as the next hop to all destinations.
A host uses a default route to identify the Layer 2 address of an end device on the local network.
A host uses a default route to transfer data to a host outside the local network when no other route to the destination exists.

Here’s the chapter 3 test.  These answers are only provided as a guide to hep you understand the test.  If you don’t understand why something is correct feel free to ask a question below.

What application layer protocol is commonly used to support for file transfers between a client and a server?

• HTML
• HTTP
• FTP
• Telnet

What are two forms of application layer software? (Choose two.)

• applications
• dialogs
• requests
• services
• syntax

A network administrator is designing a network for a new branch office of twenty-five users. What are the advantages of using a client-server model? (Choose two.)

• centralized administration
• does not require specialized software
• security is easier to enforce
• lower cost implementation
• provides a single point of failure

What is the purpose of resource records in DNS?

• temporarily holds resolved entries
• used by the server to resolve names
• sent by the client to during a query
• passes authentication information between the server and client

What is the automated service that matches resource names with the required IP address?

• HTTP
• SSH
• FQDN
• DNS
• Telnet
• SMTP

What three protocols operate at the Application layer of the OSI model? (Choose three.)

• SRP
• DNS
• PPP
• SMTP
• POP
• ICMP

What are three properties of peer-to-peer applications? (Choose three.)

• acts as both a client and server within the same communication
• requires centralized account administration
• hybrid mode includes a centralized directory of files
• can be used in client-server networks
• requires a direct physical connection between devices
• centralized authentication is required

Which application layer protocols correctly match a corresponding function? (Choose two.)

• DNS dynamically allocates IP addresses to hosts
• HTTP transfers data from a web server to a client
• POP delivers email from the client to the server email server
• SMTP supports file sharing
• Telnet provides a virtual connection for remote access

Which email components are used to forward mail between servers? (Choose two.)

• MDA
• IMAP
• MTA
• POP
• SMTP
• MUA

As compared to SSH, what is the primary disadvantage of telnet?

• not widely available
• does not support encryption
• consumes more network bandwidth
• does not support authentication

Which statements are correct concerning the role of the MTA in handling email? (Choose three.)

• routes email to the MDA on other servers
• receives email from the client’s MUA
• receives email via the POP3 protocol
• receives email via the POP3 protocol
• uses SMTP to route email between servers
• delivers email to clients via the POP3 protocol

Which two protocols are used to control the transfer of web resources from a web server to a client browser? (Choose two.)

• ASP
• FTP
• HTML
• HTTP
• HTTPS
• IP

A small home network has been installed to interconnect three computers together for gaming and file sharing. What two properties represent this network type? (Choose two.)

• User accounts are centralized.
• Security is difficult to enforce.
• Specialized operating system software is required.
• File permissions are controlled by a single computer.
• A computer that responds to a file sharing request is functioning as a server.

Which layer of the OSI model supplies services that allow user to interface with the network?

• physical
• session
• network
• presentation
• application
• transport

Refer to the exhibit. What is the destination port for the communication that is represented on line 5?

• 80
• 1261
• 15533
• 3912
• 65520

What are two characteristics of peer-to-peer networks? (Choose two.)

• scalable
• one way data flow
• decentralized resources
• centralized user accounts
• resource sharing without a dedicated server

What application layer protocol describes the services that are used for file sharing in Microsoft networks?

• DHCP
• DNS
• SMB
• SMTP
• Telnet

What are two characteristics of clients in data networks? (Choose two.)

• use daemons
• initiate data exchanges
• are repositories of data
• may upload data to servers
• listen for requests from servers

What is the role of the OSI application layer?

• provides segmentation of data
• provides encryption and conversion of data
• provides the interface between the applications on either end of the network
• provides control of all the data flowing between the source and destination devices

How does the application layer on a server usually process multiple client request for services?

• ceases all connections to the service
• denies multiple connections to a single daemon
• suspends the current connection to allow the new connection
• uses support from lower layer functions to distinguish between connections to the service