Introduction to Networks
ITN Practice Final – Introduction to Networks (Version 5.0)
1
A network administrator is designing a new network infrastructure that includes both wired and wireless connectivity. Under which situation would a wireless connection be recommended?
The end-user device requires a dedicated connection because of performance requirements.
The end-user device area has a high concentration of RFI.
The end-user device needs mobility when connecting to the network.*
The end-user device only has an Ethernet NIC.
2
A user is attempting to do an http://www.cisco.com/ without success. Which two configuration values must be set on the host to allow this access? (Choose two.)
WINS server
HTTP server
Netbios
DNS server*
default gateway*
3
Which two statements are correct in a comparison of IPv4 and IPv6 packet headers? (Choose two.)
The Source Address field name from IPv4 is kept in IPv6.*
The Version field from IPv4 is not kept in IPv6.
The Destination Address field is new in IPv6.
The Header Checksum field name from IPv4 is kept in IPv6.
The Time-to-Live field from IPv4 has been replaced by the Hop Limit field in IPv6.*
4
A user calls the help desk to report that a Windows XP workstation is unable to connect to the network after startup and that a popup window says “This connection has limited or no connectivity.” The technician asks the user to issue the ipconfig /all command. The user reports the IP address is 169.254.69.196 with subnet mask of 255.255.0.0 and nothing is displayed for the DNS server IP address. What is the cause of the problem?
The DNS server IP address needs to be configured.
The subnet mask was configured incorrectly.
The workstation is unable to obtain an IP address from a DHCP server.*
The workstation NIC has malfunctioned.
5
A network administrator has been issued a network address of 192.31.7.64/26. How many subnets of equal size could be created from the assigned /26 network by using a /28 prefix?
16
8
3
6
4*
14
6
Why are port numbers included in the TCP header of a segment?
to allow the receiving host to assemble the packet in the proper order
to enable a receiving host to forward the data to the appropriate application*
to determine which Layer 3 protocol should be used to encapsulate the data
to identify which switch ports should receive or forward the segment
to indicate the correct router interface that should be used to forward a segment
7
Refer to the exhibit. Which layer of the OSI model would format data in this way?
data link*
application
transport
network
physical
8
Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.
What is the secret keyword that is displayed on the web page?
cisco
switch
frame
packet*
router
9
Which two types of applications rely on their traffic having priority over other traffic types through the network? (Choose two.)
voice*
file transfer
instant messaging
video*
10
Fill in the blank.
In dotted decimal notation, the IP address “172.25.0.126″ is the last host address for the network 172.25.0.64/26.
11
Which devices should be secured to mitigate against MAC address spoofing attacks?
Layer 2 devices*
Layer 7 devices
Layer 3 devices
Layer 4 devices
12
Which IPv6 address notation is valid?
ABCD:160D::4GAB:FFAB
2001:0DB8::ABCD::1234
2001:DB8:0:1111::200*
2001::ABCD::
13
To revert to a previous configuration, an administrator issues the command copy tftp startup-config on a router and enters the host address and file name when prompted. After the command is completed, why does the current configuration remain unchanged?
A TFTP server can only be used to restore the Cisco IOS, not the router configuration.
The command should have been copy startup-config tftp.
The configuration should have been copied to the running configuration instead.*
The configuration changes were copied into RAM and require a reboot to take effect.
14
What are two characteristics of a scalable network? (Choose two.)
is not as reliable as a small network
grows in size without impacting existing users*
easily overloaded with increased traffic
suitable for modular devices that allow for expansion*
offers limited number of applications
15
Which two functions are primary functions of a router? (Choose two.)
packet switching*
microsegmentation
domain name resolution
flow control
path selection*
16
Using default settings, what is the next step in the router boot sequence after the IOS loads from flash?
Perform the POST routine.
Search for a backup IOS in ROM.
Load the bootstrap program from ROM.
Load the running-config file from RAM.
Locate and load the startup-config file from NVRAM.*
17
A router boots and enters setup mode. What is the reason for this?
Cisco IOS is missing from flash memory.
The POST process has detected hardware failure.
The IOS image is corrupt.
The configuration file is missing from NVRAM.*
18
What is an ISP?
It is a networking device that combines the functionality of several different networking devices in one.
It is an organization that enables individuals and businesses to connect to the Internet.*
It is a protocol that establishes how computers within a local network communicate.
It is a standards body that develops cabling and wiring standards for networking.
19
Subnet 192.168.1.32/27 will have a valid host range from 192.168.1.33 – 192.168.1.62 with the broadcast address as 192.168.1.63
Subnet 192.168.1.64/27 will have a valid host range from 192.168.1.65 – 192.168.1.94 with the broadcast address as 192.168.1.95
Subnet 192.168.1.96/27 will have a valid host range from 192.168.1.97 – 192.168.1.126 with the broadcast address as 192.168.1.127
20
What information is added during encapsulation at OSI Layer 3?
source and destination port number
source and destination MAC
source and destination IP address*
source and destination application protocol
21
What are two ways that TCP uses the sequence numbers in a segment? (Choose two.)
to limit the number of segments that can be sent out of an interface at one time
to determine if the packet changed during transit
to specify the order in which the segments travel from source to destination
to reassemble the segments at the remote location*
to identify missing segments at the destination*
22
Which statement describes a characteristic of the traceroute utility?
It is primarily used to test connectivity between two hosts.
It sends four Echo Request messages.
It identifies the routers in the path from a source host to a destination host.*
It utilizes the ICMP Source Quench messages.
23
Refer to the exhibit. HostA is attempting to contact ServerB. Which two statements correctly describe the addressing that HostA will generate in the process? (Choose two.)
A packet with the destination IP address of RouterA.
A frame with the destination MAC address of SwitchA.
A frame with the destination MAC address of RouterA.*
A packet with the destination IP address of RouterB.
A packet with the destination IP address of ServerB.*
A frame with the destination MAC address of ServerB.
24
For which three reasons was a packet-switched connectionless data communications technology used when developing the Internet? (Choose three.)
It requires that a data circuit between the source and destination be established before data can be transferred.
It can rapidly adapt to the loss of data transmission facilities.*
It efficiently utilizes the network infrastructure to transfer data.*
It allows for billing of network use by the amount of time a connection is established.
Data packets can travel multiple paths through the network simultaneously.*
25
A network administrator is troubleshooting connectivity issues on a server. Using a tester, the administrator notices that the signals generated by the server NIC are distorted and not usable. In which layer of the OSI model is the error categorized?
data link layer
physical layer*
network layer
presentation layer
26
What will a host on an Ethernet network do if it receives a frame with a destination MAC address that does not match its own MAC address?
It will remove the frame from the media.
It will discard the frame.*
It will forward the frame to the next host.
It will strip off the data-link frame to check the destination IP address.
27
What are the three parts of an IPv6 global unicast address? (Choose three.)
broadcast address
global routing prefix*
subnet mask
subnet ID*
interface ID*
28
A PC that is communicating with a web server is utilizing a window size of 6,000 bytes when sending data and a packet size of 1,500 bytes. What byte of information will the web server acknowledge after it has received four packets of data from the PC?
1,500
5
6,001*
1,501
6,000
29
What three primary functions does data link layer encapsulation provide? (Choose three.)
error detection*
port identification
addressing*
path determination
IP address resolution
frame delimiting*
30
Refer to the exhibit. A network engineer is attempting to connect to a new router to perform the initial configuration. The engineer connects a rollover cable from the serial port of a PC to the Aux port on the router, then configures HyperTerminal as shown. The engineer cannot get a login prompt in HyperTerminal. What would fix the problem?
Move the cable to the router console port.*
Use a crossover cable instead of a rollover cable.
Connect to the Ethernet port on the PC.
Change connection settings to even parity.
31
The administrator of a branch office receives an IPv6 prefix of 2001:db8:3000::/52 from the corporate network manager. How many subnets can the administrator create?
1024
2048
4096*
8192
65536
32
Refer to the exhibit. Which two settings could be changed to improve security on the wireless network? (Choose two.)
wide channel
radio band
SSID*
network mode
SSID broadcast*
standard channel
33
Fill in the blank using a number.
The minimum Ethernet frame size is “64” bytes. Anything smaller than that should be considered a “runt frame.”
34
Refer to the exhibit. From global configuration mode, an administrator is attempting to create a message-of-the-day banner by using the command banner motd V Authorized access only! Violators will be prosecuted! V When users log in using Telnet, the banner does not appear correctly. What is the problem?
The symbol “!” signals the end of a banner message.
Message-of-the-day banners will only appear when a user logs in through the console port.
The banner message is too long.
The delimiting character appears in the banner message.*
35
Which router configuration mode would an administrator use to configure the router for SSH or Telnet login access?
interface
router
line*
privileged EXEC
global
36
Which service will translate private internal IP addresses into Internet routable public IP addresses?
NAT*
DNS
ARP
DHCP
37
What three statements describe features or functions of media access control? (Choose three.)
Ethernet utilizes CSMA/CD.*
802.11 utilizes CSMA/CD.
It uses contention-based access also known as deterministic access.
Data link layer protocols define the rules for access to different media.*
Controlled media access involves collision handling.
It is responsible for detecting transmission errors in transmitted data.*
38
Fill in the blank. Do not abbreviate. Use lower case.
Which interface configuration mode command puts a Layer 3 switch interface into Layer 3 mode?
” no switchport ”
39
Open the PT activity. Perform the tasks in the activity instructions and then answer the question.
Which information is obtained from this command output?
10.20.20.3, non-authoritative answer*
10.20.20.4, non-authoritative answer
10.20.20.3, authoritative answer
10.20.20.4, authoritative answer
40
A small satellite office has been given the overall network number of 192.168.99.0/24 and the network technician can subdivide the network addresses as needed. The office needs network access for both wired and wireless devices. However, because of the security consideration, these two networks should be separate. The wired network will have 20 devices. The wireless network has a potential connection of 45 devices. Which addressing scheme would be most efficient for these two networks?
192.168.99.0/27
192.168.99.32/28
192.168.99.0/27
192.168.99.32/26
192.168.99.0/26
192.168.99.64/27 **************
192.168.99.0/28
192.168.99.64/26
192.168.99.0/28
192.168.99.16/28
41
What makes fiber preferable to copper cabling for interconnecting buildings? (Choose three.)
greater bandwidth potential*
limited susceptibility to EMI/RFI*
durable connections
easily terminated
greater distances per cable run*
lower installation cost
42
A network team is comparing physical WAN topologies for connecting remote sites to a headquarters building. Which topology provides high availability and connects some, but not all, remote sites?
point-to-point
mesh
partial mesh*
hub and spoke
43
What is the function of CSMA/CA in a WLAN?
It assures that clients are connected to the correct WLAN.
It describes the smallest building block of the WLAN.
It provides the mechanism for media access.*
It allows a host to move between cells without loss of signal.
44
A network administrator enters the service password-encryption command into the configuration mode of a router. What does this command accomplish?
This command provides an exclusive encrypted password for external service personnel who are required to do router maintenance.
This command enables a strong encryption algorithm for the enable secret password command.
This command encrypts passwords as they are transmitted across serial WAN links.
This command prevents someone from viewing the running configuration passwords.*
This command automatically encrypts passwords in configuration files that are currently stored in NVRAM.
45
Fill in the blank.
A nibble consists of “4” bits.
46
Place the options in the following order:
[+] cables connecting rooms to wiring closets
[+] desktop PC in a classroom
[#] IP address of a server
[#] a switch located in a classroom
[+] Order does not matter within this group.
[#] Order does not matter within this group.
47
Why are the paired wires twisted in a CAT5 cable?
to improve the mechanical strength
to provide eletromagnetic noise cancellation*
to facilitate cable termination in the connector
to extend the signaling length
48
A medium-sized business is researching available options for connecting to the Internet. The company is looking for a high speed option with dedicated, symmetric access. Which connection type should the company choose?
cable modem
DSL
satellite
leased line*
dialup
49
Refer to the exhibit. What will be the result of entering this configuration the next time a network administrator connects a console cable to the router and no additional commands have been entered?
The administrator will be presented with the R1> prompt.*
The administrator will be required to enter Cisco789.
The administrator will be required to enter Cisco234.
The administrator will be required to enter Cisco123.
50
The ARP table in a switch maps which two types of address together?
Layer 2 address to a Layer 4 address
Layer 3 address to a Layer 2 address*
Layer 4 address to a Layer 2 address
Layer 3 address to a Layer 4 address
51
Which is a function of the show ip route command when used as a tool for troubleshooting network connectivity?
shows the IP address of the next hop router for each route*
lists the IP addresses of all hops the traffic will pass through to reach the destination network
shows the incoming and outgoing interfaces the traffic will go through in order to reach the destination network
indicates the point of failure in the connection
52
Refer to the graphic. What is the effect of setting the security mode to WEP on the Linksys integrated router?
It encrypts data between the wireless client and the access point.*
It identifies the wireless LAN.
It allows the access point to inform clients of its presence.
It translates an internal address or group of addresses into an outside, public address.
It translates IP addresses into easy-to-remember domain names.
53
54
What are two actions performed by a Cisco switch? (Choose two.)
building a routing table that is based on the first IP address in the frame header
utilizing the MAC address table to forward frames via the destination MAC address*
forwarding frames with unknown destination IP addresses to the default gateway
using the source MAC addresses of frames to build and maintain a MAC address table*
examining the destination MAC address to add new entries to the MAC address table
55
Refer to the exhibit. Using VLSM, what is the largest and smallest subnet mask required on this network in order to minimize address waste?
255.255.254.0 and 255.255.255.252*
255.255.255.128 and 255.255.255.224
255.255.254.0 and 255.255.255.224
255.255.255.0 and 255.255.255.252
56
Refer to the exhibit. An administrator is testing connectivity to a remote device with the IP address 10.1.1.1. What does the output of this command indicate?
The connection timed out while waiting for a reply from the remote device.
A ping packet is being blocked by a security device along the path.
A router along the path did not have a route to the destination.*
Connectivity to the remote device was successful.
57
What is one purpose of the TCP three-way handshake?
synchronizing sequence numbers between source and destination in preparation for data transfer*
determining the IP address of the destination host in preparation for data transfer
sending echo requests from the source to the destination host to establish the presence of the destination
requesting the destination to transfer a binary file to the source
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