Why are port numbers included in the TCP header of a segment?

to enable a receiving host to forward the data to the appropriate application

to indicate the correct router interface that should be used to forward a segment

to identify which switch ports should receive or forward the segment

to determine which Layer 3 protocol should be used to encapsulate the data

to allow the receiving host to assemble the packet in the proper order

Which statement is true about variable-length subnet masking?

The size of each subnet may be different, depending on requirements.

Subnets may only be subnetted one additional time.

Bits are returned, rather than borrowed, to create additional subnets.

In what two situations would UDP be the preferred transport protocol over TCP? (Choose two.)

when a faster delivery mechanism is needed

when applications do not need to guarantee delivery of the data

when applications need to guarantee that a packet arrives intact, in sequence, and unduplicated

when delivery overhead is not an issue

when destination port numbers are dynamic

What important information is added to the TCP/IP transport layer header to ensure communication and connectivity with a remote network device?

destination and source port numbers

destination and source physical addresses

destination and source logical network addresses

Which scenario describes a function provided by the transport layer?

A student has two web browser windows open in order to access two web sites. The transport layer ensures the correct web page is delivered to the correct browser window.

A student is using a classroom VoIP phone to call home. The unique identifier burned into the phone is a transport layer address used to contact another network device on the same network.

A student is playing a short web-based movie with sound. The movie and sound are encoded within the transport layer header.

A corporate worker is accessing a web server located on a corporate network. The transport layer formats the screen so the web page appears properly no matter what device is being used to view the web site.

What are two ways that TCP uses the sequence numbers in a segment? (Choose two.)

to reassemble the segments at the remote location

to identify missing segments at the destination

to specify the order in which the segments travel from source to destination

o limit the number of segments that can be sent out of an interface at one time

to determine if the packet changed during transit

Which three statements characterize UDP? (Choose three.)

UDP relies on application layer protocols for error detection.

UDP provides basic connectionless transport layer functions.

UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms.

UDP provides connection-oriented, fast transport of data at Layer 3.

UDP relies on IP for error detection and recovery.

What is a key characteristic of the peer-to-peer networking model?

resource sharing without a dedicated server

social networking without the Internet

network printing using a print server

A PC obtains its IP address from a DHCP server. If the PC is taken off the network for repair, what happens to the IP address configuration?

The address is returned to the pool for reuse when the lease expires.

The configuration is permanent and nothing changes.

The address lease is automatically renewed until the PC is returned.

The configuration is held by the server to be reissued when the PC is returned.

When planning for network growth, where in the network should packet captures take place to assess network traffic?

on as many different network segments as possible

only at the edge of the network

between hosts and the default gateway

only on the busiest network segment only on the busiest network segment

Which example of malicious code would be classified as a Trojan horse?

malware that was written to look like a video game

malware that requires manual user intervention to spread between systems

malware that attaches itself to a legitimate program and spreads to other programs when launched

malware that can automatically spread from one system to another by exploiting a vulnerability in the target

When applied to a router, which command would help mitigate brute-force password attacks against the router?

login block-for 60 attempts 5 within 60

banner motd $Max failed logins = 5$

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?

A router along the path did not have a route to the destination.

Connectivity to the remote device was successful.

A ping packet is being blocked by a security device along the path.

The connection timed out while waiting for a reply from the remote device.

How does quality of service help a network support a wide range of applications and services?

by providing mechanisms to manage congested network traffic

by limiting the impact of a network failure

by allowing quick recovery from network failures

by providing the ability for the network to grow to accommodate new users

What source IP address does a router use by default when the traceroute command is issued?

the IP address of the outbound interface

the highest configured IP address on the router

the lowest configured IP address on the router

After making configuration changes on a Cisco switch, a network administrator issues a copy running-config startup-config command. What is the result of issuing this command?

The new configuration will be loaded if the switch is restarted.

The new configuration will be stored in flash memory.

The current IOS file will be replaced with the newly configured file.

The configuration changes will be removed and the original configuration will be restored.

CCNA1 Exam 41-80

Computers

1st Grade - University

Used 40+ times

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MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What is the most compressed representation of the IPv6 address 2001:0000:0000:abcd:0000:0000:0000:0001?

2001:0:abcd::1

2001:0:0:abcd::1

2001::abcd::1

2001:0000:abcd::1

2001::abcd:0:1

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

Which range of link-local addresses can be assigned to an IPv6-enabled interface?

FEC0::/10

FDEE::/7

FE80::/10

FF00::/8

MULTIPLE SELECT QUESTION

2 mins • 1 pt

Which three addresses are valid public addresses? (Choose three.)

198.133.219.17

192.15.301.245

64.104.78.227

128.107.12.117

192.15.301.240

MULTIPLE SELECT QUESTION

2 mins • 1 pt

Refer to the exhibit. On the basis of the output, which two statements about network connectivity are correct? (Choose two.)

There is connectivity between this device and the device at 192.168.100.1.

The connectivity between these two hosts allows for videoconferencing calls.

There are 4 hops b**etween this device and the device at 192.168.100.1.

The average transmission time between the two hosts is 2 milliseconds.

This host does not have a default gateway configured.

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

What type of IPv6 address is FE80::1?

loopback

link-local

multicast

global unicast

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?

254

190

192

MULTIPLE CHOICE QUESTION

2 mins • 1 pt

A site administrator has been told that a particular network at the site must accommodate 126 hosts. Which subnet mask would be used that contains the required number of host bits?

255.255.255.0

255.255.255.128

255.255.255.224

255.255.255.240

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CCNA1 Exam 41-80

What is the most compressed representation of the IPv6 address 2001:0000:0000:abcd:0000:0000:0000:0001?

Which range of link-local addresses can be assigned to an IPv6-enabled interface?

Which three addresses are valid public addresses? (Choose three.)

Refer to the exhibit. On the basis of the output, which two statements about network connectivity are correct? (Choose two.)

What type of IPv6 address is FE80::1?

How many valid host addresses are available on an IPv4 subnet that is configured with a /26 mask?

A site administrator has been told that a particular network at the site must accommodate 126 hosts. Which subnet mask would be used that contains the required number of host bits?

How many hosts are addressable on a network that has a mask of 255.255.255.248?

Which subnet would include the address 192.168.1.96 as a usable host address?

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