Final Part 2

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*

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*

Which domain name would be an example of a top-level domain?

.com

Match the packets with their destination IP address to the exiting interfaces on the router. (Not all targets are used.)

172.17.6.15 172.17.14.8 172.17.12.10 172.17.10.5 172.17.8.20

Refer to the exhibit. Consider the IP address of 192.168.10.0/24 that has been assigned to a high school building. The largest network in this building has 100 devices. If 192.168.10.0 is the network number for the largest network, what would be the network number for the next largest network, which has 40 devices?

192.168.10.128*

What subnet mask is needed if an IPv4 network has 40 devices that need IP addresses and address space is not to be wasted?

255.255.255.192*

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.*

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

DHCP*

A user is unable to reach the web site 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 *

A home user is looking for an ISP connection that provides high speed digital transmission over regular phone lines. What ISP connection type should be used?

DSL*

Logical topology diagram:

IP address of a server

What function does pressing the Tab key have when entering a command in IOS?

It completes the remainder of a partially typed word in a command.*

What unique address is embedded in an Ethernet NIC and used for communication on an Ethernet network?

MAC address*

Which statement accurately describes a TCP/IP encapsulation process when a PC is sending data to the network?

Segments are sent from the transport layer to the internet layer.*

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.*

Under which two circumstances will a switch flood a frame out of every port except the port that the frame was received on? (Choose two.)

The frame has the broadcast address as the destination address. * The destination address is unknown to the switch.*

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.*

During the encapsulation process, what occurs at the data link layer for a PC connected to an Ethernet network?

The physical address is added.*

Which statement is true about variable-length subnet masking?

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

What are two characteristics of Ethernet MAC addresses? (Choose two.)

They are globally unique.* They are expressed as 12 hexadecimal digits.*

Which three statements characterize UDP? (Choose three.)

UDP provides basic connectionless transport layer functions.* UDP relies on application layer protocols for error detection. * UDP is a low overhead protocol that does not provide sequencing or flow control mechanisms.*

A company is expanding its business to other countries. All branch offices must remain connected to corporate headquarters at all times. Which network technology is required to support this requirement?

WAN

Privileged exec mode:

accessid my entering the enable command identiefied by prompt ending in # character

Which connection provides a secure CLI session with encryption to a Cisco network device?

an SSH connection*

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

by providing mechanisms to manage congested network traffic*

Global Configuration:

changes made affect the device as a whole access my entering the configure terminal command

Where are Cisco IOS debug output messages sent by default?

console line*

If a device receives an Ethernet frame of 60 bytes, what will it do?

drop the frame*

Which two tasks are functions of the presentation layer? (Choose two.)

encryption compression*

Which switching method has the lowest level of latency?

fast-forward*

What layer is responsible for routing messages through an internetwork in the TCP/IP model?

internet*

User exec mode:

limited number basic monitoring commands first line in the command line of an IOS device

Physical topolgy diagram:

location of a desktop pc in a classroom path of cables that connect rooms to wiring closets

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*

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

malware that was written to look like a video game*

A technician can ping the IP address of the web server of a remote company but cannot successfully ping the URL address of the same web server. Which software utility can the technician use to diagnose the problem?

nslookup*

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*

Which two functions are primary functions of a router? (Choose two.)

packet forwarding* path selection*

What are two characteristics shared by TCP and UDP? (Choose two.)

port numbering* use of checksum*

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

resource sharing without a dedicated server*

Which two commands can be used on a Windows host to display the routing table? (Choose two.)

route print* netstat -r*

Refer to the exhibit. A network administrator is configuring access control to switch SW1. If the administrator has already logged into a Telnet session on the switch, which password is needed to access privileged EXEC mode?

secretin

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*

What is the TCP mechanism used in congestion avoidance?

sliding window*

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

the IP address of the outbound interface*

A user opens three browsers on the same PC to access www.cisco.com to search for certification course information. The Cisco web server sends a datagram as a reply to the request from one of the web browsers. Which information is used by the TCP/IP protocol stack in the PC to identify which of the three web browsers should receive the reply?

the destination port number*

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

to identify missing segments at the destination * to reassemble the segments at the remote location*

Which procedure is used to reduce the effect of crosstalk in copper cables?

twisting opposing circuit wire pairs together*

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

when applications do not need to guarantee delivery of the data* when a faster delivery mechanism is needed*