CCNA 1 final exam

What is the binary representation for the decimal number 168?

10101000

Although CSMA/CD is still a feature of Ethernet, why is it no longer necessary?

the use of full-duplex capable Layer 2 switches

Which command can be used on a Cisco router to display the routing table?

show ip route

Which statement is a characteristic of a MAC address?

It is analogous to a name or ID number.

What information is part of a OSI Layer 3 header?

Source and destination IP addresses

Which of the following is done to an IP packet just before it is transmitted over the physical medium in bits?

It is encapsulated in a Layer 2 frame.

To which memory location on a Cisco router or switch do you save the startup configuration file?

NVRAM

What is the decimal equivalent of 0xC8?

200

What is characteristic of a logical topology?

A logical topology is concerned with how a network transfers data.

To what subnet does the IP address 175.15.50.100 belong if a subnet mask of 255.255.0.0 is used?

175.15.0.0

A wireless LAN is being deployed inside the new one room office that is occupied by the park ranger. The office is located at the highest part of the national park. After network testing is complete, the technicians report that the wireless LAN signal is occasionally affected by some type of interference. What is a possible cause of the signal distortion?

the microwave oven

A router forwards data based on which of the following?

destination network

Which type of UTP cable is used to connect a router port to a router port?

Crossover

Which traffic type requires delay sensitive delivery?

video

A network technician suspects that a particular network connection between two Cisco switches is having a duplex mismatch. Which command would the technician use to see the Layer 1 and Layer 2 details of a switch port?

show interfaces

A network technician is investigating network connectivity from a PC to a remote host with the address 10.1.1.5. Which command, when issued on a Windows PC, will display the path to the remote host?

tracert 10.1.1.5

What type of traffic would most likely have the highest priority through the network?

voice

Which statement is true about CDP on a Cisco device?

CDP can be disabled globally or on a specific interface.

When should an administrator establish a network baseline?

at regular intervals over a period of time

A small company has only one router as the exit point to its ISP. Which solution could be adopted to maintain connectivity if the router itself, or its connection to the ISP, fails?

Have a second router that is connected to another ISP.

Which process failed if a computer cannot access the internet and received an IP address of 169.254.142.5?

DHCP

What factor should be considered in the design of a small network when devices are being chosen?

cost of devices

Which element of scaling a network involves identifying the physical and logical topologies?

network documentation

Where are Cisco IOS debug output messages sent by default?

console line

Which network design consideration would be more important to a large corporation than to a small business?

redundancy

A newly hired network technician is given the task of ordering new hardware for a small business with a large growth forecast. Which primary factor should the technician be concerned with when choosing the new devices?

devices with support for modularity

What mechanism helps to minimize network latency for real-time streaming applications?

Qos

A user is unable to reach the website when typing http://www.cisco.com in a web browser, but can reach the same site by typing http://72.163.4.161. What is the issue?

DNS

Which command will block login attempts on RouterA for a period of 2 minutes if there are 3 failed login attempts within 20 seconds?

login block-for 120 attempts 3 within 20

Which three services are provided by the AAA framework? (Choose three.)

accounting

authentication

authorization

Which type of network threat is intended to prevent authorized users from accessing resources?

DoS attacks

What is one of the most effective security tools available for protecting users from external threats?

firewalls

Which of the following are necessary to implement SSH access to a router? (Choose three.)

a local login that includes a username and password

an interface configured with an IP address

an IP domain name

What type of attack may involve the use of tools such as nslookup?

reonnaissance attack

A network administrator establishes a connection to a switch via SSH. What characteristic uniquely describes the SSH connection?

remote access to a switch where data is encrypted during the session

What is the purpose of the network security accounting function?

to keep track of the actions of a user

Some routers and switches in a wiring closet malfunctioned after an air conditioning unit failed. What type of threat does this situation describe?

environmental

Which benefit does SSH offer over Telnet for remotely managing a router?

encryption

For security reasons a network administrator needs to ensure that local computers cannot ping each other. Which settings can accomplish this task?

firewall settings

Which component is designed to protect against unauthorized communications to and from a computer?

firewall

What is the objective of a network reconnaissance attack?

discovery and mapping of systems

Which malicious code attack is self-replicated on a network and tries to exploit a specific vulnerability in a system being attacked?

worm

What does the term vulnerability mean?

weakness that makes a target susceptible to an attack

Which TCP/IP model layer is closest to the end user?

application

What message type is used by an HTTP client to request data from a web server?

GET

Which application layer protocol is used to provide file-sharing and print services to Microsoft applications?

SMB

When retrieving email messages, which protocol allows for easy, centralized storage and backup of emails that would be desirable for a small- to medium-sized business?

IMAP

A wireless host needs to request an IPv4 address. What protocol would be used to process the request?

DHCP

What is a characteristic of the application layer of the TCP/IP model?

closest to the end user

Which protocol uses encryption?

HTTPS

On a home network, which device is most likely to provide dynamic IPv4 addressing to clients on the home network?

a home router

Which task can be performed by a local DNS server?

forwarding name resolution requests between servers

What part of the URL, http://www.cisco.com/index.html,Links to an external site. represents the top-level DNS domain?

.com

Which statement is true about FTP?

The client can download data from or upload data to the server.

Which protocol can be used to transfer messages between email servers?

SMTP

Why is DHCP for IPv4 preferred for use on large networks?

It is a more efficient way to manage IPv4 addresses than static address assignment is.

Which protocol or standard is used at the application layer of the TCP/IP model?

HTTP

What is the purpose of using a source port number in a TCP communication?

to keep track of multiple conversations beween devices

Which number or set of numbers represents a socket?

192.168.1.1:80

What TCP mechanism is used to enhance performance by allowing a device to continuously send a steady stream of segments as long as the device is also receiving necessary acknowledgements?

sliding window

Which operation is provided by TCP but not by UDP?

retransmitting any unacknowledged data

What happens if part of an FTP message is not delivered to the destination?

The part of the FTP message that was lost is re-sent.

What is a responsibility of transport layer protocols?

tracking individual conversations

What best describes a socket?

the combination of a source IP address and port number or a destination IP address and port number

What is the complete range of TCP and UDP well-known ports?

0-1023

Which transport layer feature is used to establish a connection-oriented session?

TCP 3-way handshake

What type of applications are best suited for using UDP?

applications that can make sense of segments that arrive out of order

How does a networked server manage requests from multiple clients for different services?

Each request has a combination of source and destination numbers, coming from a unique IP address.

Which two protocols are Layer 4 protocols? (Choose two)

TCP

UDP

Which service or protocol uses the preferred UDP protocol for fast transmission and low overhead?

VOIP

What type of applications are best suited for using UDP?

applications that are sesitive to delay

What is the range of addresses that can currently be used for dynamic source ports?

49152 to 65535

Which two ICMPv6 messages are used in SLAAC?

router advertisement

router solicitation

How does the ARP process use an IPv4 address?

to determine the MAC address of a device on the same network

Which command could be used on a Cisco router to view its ARP table?

show ip arp

To what type of address are ICMPv6 neighbor solicitation messages sent?

multicast

Where is the ARP table stored on a device?

RAM

Which type of memory holds the running-configuration of a router by default?

RAM

Which destination address is used in an ARP request frame?

FFFF.FFFF.FFFF.FFFF

A cybersecurity analyst believes an attacker is spoofing the MAC address of the default gateway to perform a man-in-the-middle attack. Which command should the analyst use to view the MAC address a host is using to reach the default gateway?

arp -a

What two protocols are used to determine the MAC address of a known destination device IP address (IPv4 and IPv6)?

NDP

ARP

Which table maps Layer 2 addresses to Layer 3 addresses?

ARP table

Which two ICMPv6 messages are used during the Ethernet MAC address resolution process? (Choose two.)

neighbor solicitation

neighbor adverstisement

What addresses are mapped by ARP?

destination IPv4 address to the destination MAC address

What is an attack using ARP?

ARP poisoning

What will a Layer 2 switch do when the destination MAC address of a received frame is not in the MAC table?

It will forward it out all ports except the one that it arrived through.

What will be the response from the router after the command, "router(config)# hostname portsmouth" is entered?

portsmouth(config)#

Which statement describes a feature of the IP protocol?

IP relies on upper layer services to handle situation of missing or out-of-order packets.

Which command can be used on a Cisco router to display all interfaces, the IPv4 address assigned, and the current status?

show ip interface brief

What is the purpose of the startup configuration file on a Cisco router?

to contain the commands that are used to inititally configure a router on startup

Which command is used to encrypt all passwords in a router configuration file?

service-password encryption

What is the purpose of the banner motd command?

It provides a way to make annoucements to those who log in to a router.

A router boots asks if you want to enter setup mode. What is the reason for this?

The configuration file is missing from NVRAM

A computer can access devices on the same network but cannot access devices on other networks. What is the probable cause of this problem?

The computer has an invalid defaulty gateway address

What will the password be when the command "enable secret password class" is entered in configuration mode?

an encryption of "password class"

What is stored in the NVRAM of a Cisco router?

the startup configuration

Why is NAT not needed in IPv6?

Any host or user can get a public IPv6 network address because the number of available IPv6 addresses is extremely large.

Which CLI mode allows users to access all device commands, such as those used for configuration, management, and troubleshooting?

privileged EXEC mode

Which characteristic describes the default gateway of a host computer?

the logical address of the router interface on the same network as the host computer

Which interface will allow out-of-band configuration?

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