IT 341 GMU Midterm

A client packet is received by a server. The packet has a destination port number of 22. What service is the client requesting?

SSH

TFTP

DHCP

DNS

SSH

Refer to the exhibit. What does the value of the window size specify?

Window size: 9017

the amount of data that can be sent at one time

the amount of data that can be sent before an acknowledgment is required

the total number of bits received during this TCP session

a random number that is used in establishing a connection with the 3-way handshake

the amount of data that can be sent before an acknowledgment is required

To which TCP port group does the port 414 belong?

well-known

private or dynamic

public

registered

Well-known

Refer to the exhibit. An administrator is trying to configure the switch but receives the error message that is displayed in the exhibit. What is the problem?

Switch1> config t

'^

% Invalid input detected at '^' marker

The entire command, configure terminal, must be used.

The administrator is already in global configuration mode.

The administrator must first enter privileged EXEC mode before issuing the command.

The administrator must connect via the console port to access global configuration mode.

The administrator must first enter privileged EXEC mode before issuing the command.

What is a user trying to determine when issuing a ping 10.1.1.1 command on a PC?

if the TCP/IP stack is functioning on the PC without putting traffic on the wire

if there is connectivity with the destination device

the path that traffic will take to reach the destination

what type of device is at the destination

if there is connectivity with the destination device

What is a characteristic of a switch virtual interface (SVI)?​

An SVI is created in software and requires a configured IP address and a subnet mask in order to provide remote access to the switch.

Although it is a virtual interface, it needs to have physical hardware on the device associated with it.

SVIs do not require the no shutdown command to become enabled.

SVIs come preconfigured on Cisco switches.

An SVI is created in software and requires a configured IP address and a subnet mask in order to provide remote access to the switch.

What happens when a switch receives a frame and the calculated CRC value is different than the value that is in the FCS field?

The switch notifies the source of the bad frame.

The switch places the new CRC value in the FCS field and forwards the frame.

The switch drops the frame.

The switch floods the frame to all ports except the port through which the frame arrived to notify the hosts of the error.

The switch drops the frame.

Two network engineers are discussing the methods used to forward frames through a switch. What is an important concept related to the cut-through method of switching?

The fragment-free switching offers the lowest level of latency.

Fast-forward switching can be viewed as a compromise between store-and-forward switching and fragment-free switching.

Fragment-free switching is the typical cut-through method of switching.

Packets can be relayed with errors when fast-forward switching is used.

Packets can be relayed with errors when fast-forward switching is used.

Which two issues can cause both runts and giants in Ethernet networks? (Choose two.)

using the incorrect cable type

half-duplex operations

a malfunctioning NIC

electrical interference on serial interfaces

CRC errors

half-duplex operations

a malfunctioning NIC

Which two functions are performed at the LLC sublayer of the OSI Data Link Layer to facilitate Ethernet communication? (Choose two.)

implements CSMA/CD over legacy shared half-duplex media

enables IPv4 and IPv6 to utilize the same physical medium

integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over copper

implements a process to delimit fields within an Ethernet 2 frame

places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame

Other case

responsible for internal structure of Ethernet frame

applies source and destination MAC addresses to Ethernet frame

integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over copper

enables IPv4 and IPv6 to utilize the same physical medium

handles communication between upper layer networking software and Ethernet NIC hardware

Other case

adds Ethernet control information to network protocol data

responsible for internal structure of Ethernet frame

implements trailer with frame check sequence for error detection

enables IPv4 and IPv6 to utilize the same physical medium

applies source and destination MAC addresses to Ethernet frame

Other case

implements CSMA/CD over legacy shared half-duplex media

adds Ethernet control information to network protocol data

places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame

applies source and destination MAC addresses to Ethernet frame

integrates Layer 2 flows between 10 Gigabit Ethernet over fiber and 1 Gigabit Ethernet over copper

enables IPv4 and IPv6 to utilize the same physical medium

places information in the Ethernet frame that identifies which network layer protocol is being encapsulated by the frame

handles communication between upper layer networking software and Ethernet NIC hardware

adds Ethernet control information to network protocol data

Which two commands could be used to check if DNS name resolution is working properly on a Windows PC? (Choose two.)

nslookup cisco.com

ping cisco.com

ipconfig /flushdns

net cisco.com

nbtstat cisco.com

nslookup cisco.com

ping cisco.com

A small advertising company has a web server that provides critical business service. The company connects to the Internet through a leased line service to an ISP. Which approach best provides cost effective redundancy for the Internet connection?

Add a second NIC to the web server.

Add a connection to the Internet via a DSL line to another ISP.

Add another web server to prepare failover support.

Add multiple connections between the switches and the edge router.

Add a connection to the Internet via a DSL line to another ISP.

Only employees connected to IPv6 interfaces are having difficulty connecting to remote networks. The analyst wants to verify that IPv6 routing has been enabled. What is the best command to use to accomplish the task?

copy running-config startup-config

show interfaces

show ip nat translations

show running-config

show running-config

Refer to the exhibit. A network administrator is connecting a new host to the Registrar LAN. The host needs to communicate with remote networks. What IP address would be configured as the default gateway on the new host?

Floor(config)# interface gi0/1

Floor(config-if)# description Connects to the Registrar LAN Floor(config-if)# ip address 192.168.235.234 255.255.255.0

Floor(config-if)# no shutdown

Floor(config-if)# interface gi0/0

Floor(config-if)# description Connects to the Manager LAN

Floor(config-if)# ip address 192.168.234.114 255.255.255.0

Floor(config-if)# no shutdown

Floor(config-if)# interface s0/0/0

Floor(config-if)# description Connects to the ISP

Floor(config-if)# ip address 10.234.235.254 255.255.255.0 Floor(config-if)# no shutdown

Floor(config-if)# interface s0/0/1

Floor(config-if)# description Connects to the Head Office WAN

Floor(config-if)# ip address 203.0.113.3 255.255.255.0

Floor(config-if)# no shutdown

Floor(config-if)# end

192.168.235.234

203.0.113.3

192.168.235.1

10.234.235.254

192.168.234.114

192.168.235.234

A router boots and enters setup mode. What is the reason for this?

The IOS image is corrupt.

Cisco IOS is missing from flash memory.

The configuration file is missing from NVRAM.

The POST process has detected hardware failure.

The configuration file is missing from NVRAM.

What service is provided by POP3?

Retrieves email from the server by downloading the email to the local mail application of the client.

An application that allows real-time chatting among remote users.

Allows remote access to network devices and servers.

Uses encryption to provide secure remote access to network devices and servers.

Retrieves email from the server by downloading the email to the local mail application of the client.

Two students are working on a network design project. One student is doing the drawing, while the other student is writing the proposal. The drawing is finished and the student wants to share the folder that contains the drawing so that the other student can access the file and copy it to a USB drive. Which networking model is being used?

peer-to-peer

client-based

master-slave

point-to-point

peer-to-peer

Which command is used to manually query a DNS server to resolve a specific host name?

tracert

ipconfig /displaydns

nslookup

net

nslookup

Which PDU is processed when a host computer is de-encapsulating a message at the transport layer of the TCP/IP model?

bits

frame

packet

segment

segment

Which two OSI model layers have the same functionality as two layers of the TCP/IP model? (Choose two.)

data link

network

physical

session

transport

network

transport

Which three layers of the OSI model are comparable in function to the application layer of the TCP/IP model? (Choose three.)

presentation

physical

network

data link

transport

application

session

presentation

application

session

Network information:

* local router LAN interface: 172.19.29.254 / fe80:65ab:dcc1::10* local router WAN interface: 198.133.219.33 / 2001:db8:FACE:39::10* remote server: 192.135.250.103

What task might a user be trying to accomplish by using the ping 2001:db8:FACE:39::10 command?

verifying that there is connectivity within the local network

creating a network performance benchmark to a server on the company intranet

determining the path to reach the remote server

verifying that there is connectivity to the internet

verifying that there is connectivity to the internet

Which two ICMP messages are used by both IPv4 and IPv6 protocols? (Choose two.)​

neighbor solicitation

router advertisement

router solicitation

protocol unreachable

route redirection

protocol unreachable

route redirection

A network technician types the command ping 127.0.0.1 at the command prompt on a computer. What is the technician trying to accomplish?

pinging a host computer that has the IP address 127.0.0.1 on the network

tracing the path to a host computer on the network and the network has the IP address 127.0.0.1

checking the IP address on the network card

testing the integrity of the TCP/IP stack on the local machine

testing the integrity of the TCP/IP stack on the local machine

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

the virtually unlimited availability of IPv6 addresses

the use of CSMA/CA

the use of full-duplex capable Layer 2 switches

the development of half-duplex switch operation

the use of Gigabit Ethernet speeds

the use of full-duplex capable Layer 2 switches

What does a router do when it receives a Layer 2 frame over the network medium?

re-encapsulates the packet into a new frame

forwards the new frame appropriate to the medium of that segment of the physical network

determines the best path

de-encapsulates the frame

de-encapsulates the frame

Which two acronyms represent the data link sublayers that Ethernet relies upon to operate? (Choose two.)

SFD

LLC

CSMA

MAC

FCS

LLC

MAC

A network team is comparing topologies for connecting on a shared media. Which physical topology is an example of a hybrid topology for a LAN?

bus

extended star

ring

partial mesh

extended star

Given network 172.18.109.0, which subnet mask would be used if 6 host bits were available?

255.255.192.0

255.255.224.0

255.255.255.192

255.255.255.248

255.255.255.252

255.255.255.192

What type of address is 198.133.219.162?

link-local

public

loopback

multicast

public

What does the IP address 192.168.1.15/29 represent?

subnetwork address

unicast address

multicast address

broadcast address

broadcast address

Why is NAT not needed in IPv6?​

Because IPv6 has integrated security, there is no need to hide the IPv6 addresses of internal networks.​

The problems that are induced by NAT applications are solved because the IPv6 header improves packet handling by intermediate routers.​

The end-to-end connectivity problems that are caused by NAT are solved because the number of routes increases with the number of nodes that are connected to the Internet.

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

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

What routing table entry has a next hop address associated with a destination network?

directly-connected routes

local routes

remote routes

C and L source routes

remote routes

Which term describes a field in the IPv4 packet header that contains a unicast, multicast, or broadcast address?

destination IPv4 address

protocol

TTL

header checksum

destination IPv4 address

If the default gateway is configured incorrectly on the host, what is the impact on communications?

There is no impact on communications.

The host is unable to communicate on the local network.

The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks.

The host can communicate with other hosts on remote networks, but is unable to communicate with hosts on the local network.

The host can communicate with other hosts on the local network, but is unable to communicate with hosts on remote networks.

Which is the compressed format of the IPv6 address fe80:0000:0000:0000:0220:0b3f:f0e0:0029?

fe80:9ea:0:2200::fe0:290

fe80:9ea0::2020::bf:e0:9290

fe80::220:b3f:f0e0:29

fe80:9ea0::2020:0:bf:e0:9290

fe80::220:b3f:f0e0:29

What type of IPv6 address is represented by ::1/128?

EUI-64 generated link-local

global unicast

unspecified

loopback

loopback

Which statement describes network security?

It supports growth over time in accordance with approved network design procedures.

It synchronizes traffic flows using timestamps.

It ensures sensitive corporate data is available for authorized users.

It prioritizes data flows in order to give priority to delay-sensitive traffic.

It ensures sensitive corporate data is available for authorized users.

Which two devices would be described as intermediary devices? (Choose two.)

wireless LAN controller

server

assembly line robots

IPS

gaming console

retail scanner

wireless LAN controller

IPS

What characteristic describes spyware?

software that is installed on a user device and collects information about the user

the use of stolen credentials to access private data

an attack that slows or crashes a device or network service

a network device that filters access and traffic coming into a network

software that is installed on a user device and collects information

Which destination address is used in an ARP request frame?

0.0.0.0

255.255.255.255

the physical address of the destination host

FFFF.FFFF.FFFF

AAAA.AAAA.AAAA

FFFF.FFFF.FFFF

A network administrator is issuing the login block-for 180 attempts 2 within 30 command on a router. Which threat is the network administrator trying to prevent?

a user who is trying to guess a password to access the router

a worm that is attempting to access another part of the network

an unidentified individual who is trying to access the network equipment room

a device that is trying to inspect the traffic on a link

a user who is trying to guess a password to access the router

Which statement describes the characteristics of packet-filtering and stateful firewalls as they relate to the OSI model?

A packet-filtering firewall uses session layer information to track the state of a connection, whereas a stateful firewall uses application layer information to track the state of a connection.

Both stateful and packet-filtering firewalls can filter at the application layer.

A packet-filtering firewall typically can filter up to the transport layer, whereas a stateful firewall can filter up to the session layer.

A stateful firewall can filter application layer information, whereas a packet-filtering firewall cannot filter beyond the network layer.

A packet-filtering firewall typically can filter up to the transport layer, whereas a stateful firewall can filter up to the session layer.

What are two ways to protect a computer from malware? (Choose two.)

Empty the browser cache.

Use antivirus software.

Delete unused software.

Keep software up to date.

Defragment the hard disk.

Use antivirus software.

Keep software up to date.

The employees and residents of Ciscoville cannot access the Internet or any remote web-based services. IT workers quickly determine that the city firewall is being flooded with so much traffic that a breakdown of connectivity to the Internet is occurring. Which type of attack is being launched at Ciscoville?

access

Trojan horse

reconnaissance

DoS

DoS

Which two statements describe the characteristics of fiber-optic cabling? (Choose two.)

Fiber-optic cabling does not conduct electricity.

Multimode fiber-optic cabling carries signals from multiple sending devices.

Fiber-optic cabling is primarily used as backbone cabling.

Fiber-optic cabling uses LEDs for single-mode cab​les and laser technology for multimode cables.

Fiber-optic cabling has high signal loss.

Fiber-optic cabling does not conduct electricity.

Fiber-optic cabling is primarily used as backbone cabling.

What OSI physical layer term describes the measure of the transfer of bits across a medium over a given period of time?

latency

goodput

throughput

bandwidth

throughput