CCNA 3

Ans D
The user exec mode is a subset of the privileged exec mode. Only a certain number of commands are available at the user exec mode.

100 Which OSI layer end to end communication, segmentation and re-assembly?

A.) Network
B.) Transport
C.) Physical
D.) Application
E.) Data-Link
F.) Presentation

Ans B
Layer 4 the Transport layer performs this function.
101 What IP command would you use to test the entire IP stack?

A.) Stack-test
B.) Arp
C.) Telnet
D.) Ping
E.) Trace

Ans C
Because Telnet is an application and it resides at the top of the stack it traverses down the stack and up the stack at the receiving end.

102 Identify the 2 hardware components used to manage and/or configure a router?

A.) Auxiliary port
B.) ROM port
C.) Management port
D.) Console port

Ans A D
The 2 hardware ports used to configure the router are the console and auxiliary ports.


103 What is the default bandwidth of a serial connection?

A.) 1200 baud
B.) 1.544 Mbps (T1)
C.) 10 Mbps
D.) 96Kpbs

Ans B
The default bandwidth is T1.

104 Identify 2 functions of IPX access-lists?

A.) Control SAP traffic
B.) Limit number of Novell servers on a network
C.) Limit number of workstations on a network
D.) Block IPX traffic

Ans A D
IPX access lists are used to restrict IPX traffic and SAP broadcasts.

105 Identify 2 HDLC characteristics?

A.) Default serial encapsulation
B.) Open standard
C.) Supports Stacker compression
D.) Supports point-to-point and multipoint

Ans A D
HDLC is the default serial encapsulation and supports point-to-point and multipoint. It is not an open standard and does not support compression.

106 Identify 3 IP applications?

A.) AURP
B.) ARP
C.) Telnet
D.) SMTP
E.) DNS
F.) RARP

Ans C D E
ARP and AURP are not part the application layer of the TCP/IP stack. SMTP - Simple Mail Transfer Protocol, Telnet, DNS - Domain Name Services (name to IP resolution).

107 Identify 3 LAN technologies?

A.) FDDI
B.) HDLC
C.) HSSI
D.) X.25
E.) 802.3
F.) 802.5

Ans A E F
The question is asking for 3 LAN technologies, HDLC, HSSI and X.25 are all WAN technologies.

108 Identify the 4 that are not LAN technologies?

A.) HDLC
B.) FDDI
C.) 802.5
D.) HSSI
E.) SDLC
F.) Frame Relay

Ans A D E F
802.5 and FDDI are LAN technologies

109 Which OSI layer supports the communication component of an application?

A.) Data-Link
B.) Physical
C.) Session
D.) Presentation
E.) Application
F.) Transport

Ans E
Layer 7 the Application layer performs this function.

110 Identify the length of an IPX address and it's components?

A.) 80 bits, 48 bits network and 32 bits node
B.) 32 bits, 16 bits network and 16 bits node
C.) None of the above
D.) 80 bits, 32 bits network and 48 bits node

Ans D
IPX address has 2 components; network and node. The network address is 32 bits and the node is 48 bits, total of 80 bits.
111 Identify the administrative distance and appropriate routing protocol?

A.) RIP = 255, IGRP = 100
B.) RIP = 100, IGRP = 120
C.) RIP = 1, IGRP = 0
D.) RIP = 120, IGRP = 100

Ans D
The administrative distance for RIP is 120 and IGRP is 100. The lower the AD the better the routing information.

112 Which OSI layer incorporates the MAC address and the LLC?

A.) Data link
B.) Network
C.) Physcial
D.) Transport

Ans): A
Layer 2 the Data-Link layer incorporates the MAC and LLC sublayers

113 If configuring a Cisco router to connect to a non-Cisco router across a Frame Relay network, which encapsulation type would you select?

A.) Q933a
B.) ISDN
C.) IETF
D.) CISCO
E.) ANSI

Ans C
There are two types of Frame Relay encapsulations; Cisco and IETF. IETF is required when connecting a Cisco to a non-Cisco router.

114 Identify the 2 items that TCP and UDP share in common?

A.) Both use port numbers to identify upper level applications
B.) Operate at the Network layer
C.) Both are Transport protocols
D.) Both are reliable communications

Ans A C
TCP and UPD are both layer 4 Transport protocols and both use port number to identify upper level applications.

115 Identify 3 characteristics of IP RIP?

A.) Distance vector
B.) Administrative distance is 120
C.) Periodic updates every 60 seconds
D.) Uses a composite metric
E.) Can load balance

Ans A B E
IP RIP is a distance vector protocol, it can load balance up to 4 equal cost paths and it's rating of trustworthiness is 120.

116 Which of the following is a layer 2 device?

A.) Switch
B.) Router
C.) Repeater
D.) Hub

Ans A
A Hub and Repeater are layer 1 devices. A Router is a layer 3 device.

117 Identify the definition of demarcation?

A.) Date in which the WAN service contract expires
B.) Cabling which extends from the WAN service provider to the customer
C.) Division of responsibility, where the CPE ends and the local loop begins
D.) Equipment which is located at the customer premises

Ans C
Demarcation is the point in which responsibility changes hands.

118 Identify the 3 key features of the Cisco Discovery Protocol?

A.) Off by default
B.) Will allow for the discovery of layer 3 addresses on neighbor routers
C.) Verify connectivity
D.) Open standard
E.) Does not require any layer 3 protocols to be configured

Ans B C E
CDP is used for 2 basic reasons; neighbor connectivity and layer 3 discovery if configured. It is proprietary and is on by default.

119 Identify the 3 characteristics of IPX RIP?

A.) Distance vector
B.) Does not support multiple paths
C.) 60 second updates
D.) Default encapsulation is SAP
E.) Uses ticks and hop count as a metric

Ans A C E
IPX RIP is a distance vector routing protocol, it does support multiple paths, the default encapsulation is 'novell-ether', it uses tick count as a primary metric and hop count as a tie breaker and it sends it’s updates every 60 seconds.

120 Identify the access-list range for an extended IP access-list?

A.) 800 - 899
B.) 1 - 99
C.) 1000 - 1099
D.) 100 - 199

Ans D
IP extended access-lists use the number range of 100-199.
121 Identify the X.25 addressing standard?

A.) X.121
B.) X.25a
C.) ITU-1
D.) Q933a

Ans A
The X.25 layer 3 addressing standards is X.121.

122 Identify 3 features of IGRP?

A.) Composite metric
B.) New horizon
C.) Flash updates
D.) 60 periodic updates
E.) Poison reverse

Ans A C E
IGRP uses a composite metric made up of bandwidth and delay by default, it updates every 60 seconds and will trigger an update if the topology changes.

123 Where is the backup configuration file stored?

A.) RAM
B.) ROM
C.) Console
D.) NVRAM

Ans D
One location to store the backup configuration is NVRAM.

124 Identify the correct pair of Novell Ethernet encapsulation and Cisco terminology?

A.) Ethernet II, Snap
B.) Ethernet 802.3, Novell-Ether
C.) Ethernet SNAP, Arpa
D.) Ethernet 802.2, Snap

Ans B
The default IPX LAN encapsulation is Novell-Ether which is 802.3

125 Identify 3 characteristics regarding IP access-lists?

A.) Can be configured as a standard access-list
B.) Can be run from another router running IP
C.) Can be configured as a named access-list
D.) Are the same as IPX access-lists
E.) Can be configured as an extended access-list

Ans A C E
There are 3 types of IP access-lists; standard, extended and named. Named access-lists can be either standard or extended depending on how they are configured.

126 Identify 3 ways in which a router can be configured?

A.) TFTP
B.) Nvram
C.) Ping
D.) Console
E.) Trace

Ans A B D
Changes to the configuration can be entered via the console, a config stored in NVRAM or on a TFTP server. Trace and ping are tools to verify connectivity.

127 A traffic light is an example of what type of mechanism?

A.) Collision detection
B.) Flow control
C.) Sequence numbering
D.) Network management

Ans B
A Traffic light is an example of flow control.

128 Windowing is a type of?

A.) Negative acknowledgement
B.) Address resolution
C.) Layer transition mechanism
D.) Flow control

Ans D
Windowing allow the sender and receiver to dictate how much information that can be received prior to an acknowledgement. It is a form of flow control.

129 Identify the 2 types of access-list filters that control SAP traffic?

A.) Novell-ether
B.) Arpa
C.) Input-sap-filter
D.) Round-robin
E.) Output-sap-filter

Ans C E
SAP's can be blocked by 2 methods; inbound and outbound.

130 Identify the 3 guidelines for routers in the same autonomous system?

A.) Must be configured for IGRP or RIP
B.) Interconnected
C.) Assigned the same autonomous system number
D.) Configured for the same routing protocol
E.) Must be same model of router

Ans B C D
Autonomous system must be interconnected, assigned the same AS # and configured with the same routing protocol.
131 Identify the hardware component used to store buffers, tables, running-configuration etc?

A.) NVRAM
B.) ROM
C.) RAM
D.) Flash

Ans C
RAM is the dynamic memory area. ROM contains the boot strap code, NVRAM contains the startup-config and Flash contains the IOS.

132 Identify 3 UDP characteristics?

A.) Reliable communication protocol
B.) Applications that use UDP must incorporate reliability
C.) Connection-less oriented
D.) Incorporates no handshaking

Ans B C D
UPD is a layer 4 Transport protocol. It is connection-less because it does establish a connection therefore the 3 step handshake is not needed, it does NOT implement any flow control or acknowledgments. Any application that uses UDP must incorporate any needed reliability.

133 Identify the IPX standard access-list number range?

A.) 600 - 699
B.) 1000 - 1099
C.) 1 - 99
D.) 100 - 199
E.) 800 - 899

Ans E
IPX standard access-list range is 800-899.

134 Which OSI layer provides best effort end to end packet delivery?

A.) Data-Link
B.) Presentation
C.) Network
D.) Transport
E.) Physical
F.) Application

Ans C
Layer 3 the Network layer performs this function.

135 Identify the 2 methods to modify the routers boot sequence?
A.) Setup program
B.) Boot system commands
C.) RXBoot
D.) Config-register

Ans B D
'Boot system' command the 'config-register' are used to manipulate the boot sequence.

136 Identify the 3 pieces of hardware you would not install to prevent broadcasts?

A.) Switch
B.) Repeater
C.) Bridge
D.) Router

Ans A B C
Router are implemented not only to break up networks into smaller segments but they are used to block broadcasts.

137 Identify 2 features of PPP PAP authentication?

A.) Username and password is sent in clear text
B.) Authentication messages are sent periodically during the connection
C.) More secure than CHAP
D.) Remote node is control of authentication process

Ans A D
PPP PAP authentication sends the username and passwords in clear text and the remote node initiates the authentication process.

138 Identify the switching method that examines the destination MAC address as the frame is being received then begins forwarding the frame prior to receiving the entire frame?

A.) Fragment-free
B.) Store and Forward
C.) Cut-through
D.) Fast forward

Ans C
Cut through examines the destination MAC address and begins forwarding the frame prior to receiving the entire frame.

139 Identify 1 characteristic of RARP?

A.) IP to MAC address translation
B.) Connectionless delivery of packets
C.) Can be used to initiate remote O/S load sequence
D.) Generates error and control messages

Ans C
Reverse Address Resolution Protocol is used to obtain a layer 3 address if the MAC address is known which then facilitates the loading of the O/S.

140 Identify the protocol to test connectivity without configuring any layer 3 protocols?

A.) TCP
B.) Ping
C.) IP
D.) CDP
E.) Telnet

Ans D
CDP can be used to verify connectivity prior to any layer 3 protocols being configured.
141 LMI operates between the Frame Switch and what other device?

A.) CPE device
B.) Another Frame Switch
C.) X.25 switch
D.) Novell File Server

Ans A
LMI stands for local management interface. It operates between the Frame Relay switch and the customer equipment.

142 Identify IPX SAP and it's purpose?

A.) Sonet Access Pipe - interface to Sonet ring
B.) Service Advertising Protocol - advertise services
C.) Server Appletalk Protocol - appletalk directory services
D.) Service Access Point - identify upper layer protocols

Ans B
SAP is an Novell protocol to advertise services.

143 Identify the default values that make up IGRP's composite metric?

A.) Bandwidth
B.) Load
C.) Reliability
D.) MTU
E.) Delay

Ans A E
IGRP can be configured to use all 5 within it's metric. By default it uses bandwidth and delay.

144 Identify the default serial encapsulation?
A.) ISDN
B.) HDLC
C.) SDLC
D.) Frame Relay
E.) PPP

Ans B
The default serial encapsulation is HDLC.

145 Identify the purpose of ARP?

A.) Avoiding routing loops
B.) Determining a workstation's IP address
C.) Sending a directed broadcast
D.) Determining a workstation's MAC address

Ans D
ARP is used to find a devices MAC address given an IP address.

146 What is the purpose of the DLCI?

A.) Identifies the remote routers
B.) Contained with a 802.2 frame for routing purposes
C.) Used with PPP during authentication
D.) Identifies the PVC in a Frame Relay network

Ans D
DLCI stands for Data Link Connection Identifier. It identifies the local PVC.

147 Identify 3 characteristics of the Network layer (OSI layer 3)?

A.) Connection oriented
B.) Path determination
C.) Supports multiplexing
D.) Manages sessions
E.) Packet forwarding

Ans B C E
The network layer is responsible for routing which entails learning the paths, selecting the best path and forwarding the packet. Because it services multiple layer 4 protocols it multiplexes.

148 Identify 3 characteristics of switches?

A.) Increase available bandwidth
B.) Decrease broadcast traffic
C.) Support full duplex in a multipoint topology
D.) Make forwarding decision using MAC address
E.) Create collision domains

Ans A D E
Switches operate at layer 2. They increase bandwidth by reducing the number of devices sharing the media. They isolate collisions. Like a bridge they forward traffic based upon layer 2 address/ MAC address.

149 Which OSI layer handles physical address, network topology?

A.) Presentation
B.) Physical
C.) Transport
D.) Application
E.) Data-Link
F.) Network

Ans E
Layer 2 the Data-Link layer performs this function.

150 Identify 2 reasons for disabling CDP?

A.) If the router is not configured for RIP
B.) Save bandwidth by eliminating overhead
C.) If the router is configured for Appletalk
D.) When connected to a non-Cisco router

Ans B D
CDP can be disabled here are a couple of reasons. Connecting a Cisco router to a non-Cisco router. Don't want to exchange CDP information to save bandwidth.
151 Identify 3 characteristics of ISDN?

A.) Transports voice and data
B.) Transports voice only
C.) Support both BRI and PRI
D.) Runs over existing phone lines
E.) Same as X.25

Ans A C D
ISDN supports voice, data, and video. It runs over existing phone lines and supports 128K (BRI) and T1 (PRI).

152 Identify the 3 characteristics of IGRP?
A.) Uses hop count as a metric
B.) Supports multiple unequal paths
C.) Administrative distance is 100
D.) Configured with an Autonomous system number
E.) Link state

Ans B C D
IGRP is a distance vector routing protocol, it's degree of trustworthiness is 100, it can support up to 6 un-equal paths and must be configured with an autonomous system number.

153 Identify 2 features of PPP CHAP authentication?

A.) Username and password is sent in clear text
B.) Authentication messages are sent periodically during the connection
C.) Less secure then PAP
D.) Local router 'challenges' the remote router

Ans B D
PPP CHAP authentication message are sent periodically during the connection by challenging the other end of the connection.
It is more secure than PAP and passwords and username are encrypted.

154 Identify the default IPX serial encapsulation?

A.) Novell-Ether
B.) SDLC
C.) SNAP
D.) HDLC
Ans D
The default IPX serial encapsulation is HDLC.

155 Identify the hardware component that stores the backup configuration?

A.) RAM
B.) NVRAM
C.) Flash
D.) ROM

Ans B
NVRAM contains the backup config. RAM is the dynamic memory area, ROM contains the boot strap code and Flash contains the IOS.

156 Identify the extended IP access-list number range?

A.) 600 - 699
B.) 1 - 99
C.) 900 - 999
D.) 100 - 199

Ans D
The extended IP access-list range is 100-199.

157 Identify 3 Fast Ethernet technologies?
A.) 100 Base FastEther
B.) 100 Base FX
C.) 100 Base T4
D.) 100 Base TX

Ans B C D
100 BaseFastEther is false. 100 Base FX, TX and T4 are all valid.

158 Identify the OSI layer which is responsible for end-to-end connections?

A.) Network
B.) Transport
C.) Session
D.) Data link
E.) TCP

Ans B
Layer 4 is the Transport layer and is responsible for end-to-end connections.

159 Identify the 2 characteristics regarding MAC addresses?

A.) Contains a network portion and host portion
B.) Always assigned by System Administrator
C.) 48 bits long
D.) Contains a vendor code and serial number

Ans C D
MAC addresses are assigned by the vendor. Each MAC address is 48 bits long and made up of 24 bits vendor code and 24 bits serial number.

160 Identify the number range for IPX SAP filters?

A.) 900 - 999
B.) 1000 - 1099
C.) 800 -899
D.) 100 - 199

Ans B
The IPX SAP filtering range is 1000-1099.
161 What is the purpose of ARP?

A.) IP to host name resolution
B.) Host name to IP address resolution
C.) Mac to IP address resolution
D.) IP to Mac address resolution

Ans D
Address Resolution Protocol resolves the MAC address if the IP address is known. It is a layer 3 protocol.

162 Which OSI layer establishes, maintains and terminates sessions between hosts?

A.) Application
B.) Physical
C.) Data-Link
D.) Presentation
E.) Network
F.) Session

Ans F
Layer 5 the Session layer performs this function.

163 Which statement is true regarding Administrative distance?

A.) It is a metric
B.) Number of hops between two routers
C.) Trustworthiness of the routing information
D.) RIP Administrative distance is 100

Ans C
Administrative distance is rating of trustworthiness of the routing information. The lower the AD the better the information.

164 Identify the purpose of the Ping command?

A.) Share routing information with a neighbor router
B.) Transmit user data when buffers are full
C.) Test connectivity at layer 3
D.) Test entire protocol stack

Ans C
The ping command tests layer 3 connectivity.

165 Identify the order of the 5 step encapsulation?

1. Create the segment
2. Convert the frame to bits
3. Create the packet
4. Create the frame
5. User creates the data
A.) 1,2,4,2,5
B.) 2,1,3,4,5
C.) 5,1,3,4,2
D.) 5,3,4,1,2

Ans C
Cisco 5 step encapsulation.
1) User creates Data
2) Data is converted into a segment at layer 4
3) The segment is converted to packet at layer 3
4) The packet it converted into a frame at layer 2
5) The frame is converted into bits at layer 1

166 The Cisco IOS is stored where?

A.) ROM
B.) CD
C.) Flash
D.) NVRAM

Ans C
By default the Cisco IOS is stored in flash.