CCNA Quater 1 Finals

What method is used to manage contention-based access on a wireless network?

CSMA/CA

Which two statements describe how to assess traffic flow patterns and network traffic types using a protocol analyzer?

Capture traffic during peak utilization times to get a good representation of the different traffic types, Perform the capture on different network segments.

A client packet is received by a server. The packet has a destination port number of 67. What service is the client requesting?

DHCP

A user is attempting to access http://www.cisco.com/ without success. Which two configuration values must be set on the host to allow this access?

DNS server, default gateway

What is an advantage for small organizations of adopting IMAP instead of POP?

Messages are kept in the mail servers until they are manually deleted from the email client.

Which two statements accurately describe an advantage or a disadvantage when deploying NAT for IPv4 in a network?

NAT introduces problems for some applications that require end-to-end connectivity, NAT provides a solution to slow down the IPv4 address depletion.

A client packet is received by a server. The packet has a destination port number of 69. What service is the client requesting?

TFTP

Environmental threats

Temperature extremes (too hot or too cold) or humidity extremes (too wet or too dry)

Electrical threats

Voltage spikes, insufficient supply voltage (brownouts), unconditioned power (noise), and total power loss

What characteristic describes a VPN?

a tunneling protocol that provides remote users with secure access into the network of an organization

An IPv6 enabled device sends a data packet with the destination address of FF02::1. What is the target of this packet?​

all IPv6 configured routers on the local link

Which three layers of the OSI model map to the application layer of the TCP/IP model?

application, session, presentation

What characteristic describes antispyware?

applications that protect end devices from becoming infected with malicious software

What characteristic describes antivirus software?

applications that protect end devices from becoming infected with malicious software

What are two common causes of signal degradation when using UTP cabling?

improper termination, low-quality cable or connectors

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

What characteristic describes adware?

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

What characteristic describes spyware?

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

What two security solutions are most likely to be used only in a corporate environment?

virtual private networks, intrusion prevention systems

Which switching method drops frames that fail the FCS check?

store-and-forward switching

What are the three parts of an IPv6 global unicast address?

subnet ID, global routing prefix, interface ID

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

192.168.1.64/26

What is the subnet ID associated with the IPv6 address 2001:DA48:FC5:A4:3D1B::1/64?

2001:DA48:FC5:A4::/64

A network administrator is adding a new LAN to a branch office. The new LAN must support 200 connected devices. What is the smallest network mask that the network administrator can use for the new network?

255.255.255.0

A network administrator is adding a new LAN to a branch office. The new LAN must support 90 connected devices. What is the smallest network mask that the network administrator can use for the new network?

255.255.255.128

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

255.255.255.192

A network administrator is adding new LAN to a branch office. The new LAN must support 10 connected devices. What is the smallest network mask that the network administrator can use for the new network?

255.255.255.240

A network administrator is adding a new LAN to a branch office. The new LAN must support 4 connected devices. What is the smallest network mask that the network administrator can use for the new network?

255.255.255.248

What service is provided by HTTP

A basic set of rules for exchanging text, graphic images, sound, video, and other multimedia files on the web.

What service is provided by FTP?

Allows for data transfers between a client and a file server.

What happens when the transport input ssh command is entered on the switch vty lines?

Communication between the switch and remote users is encrypted.

An administrator defined a local user account with a secret password on router R1 for use with SSH. Which three additional steps are required to configure R1 to accept only encrypted SSH connections?

Configure the IP domain name on the router, generate the SSH keys, enable inbound vty SSH sessions.

A new network administrator has been asked to enter a banner message on a Cisco device. What is the fastest way a network administrator could test whether the banner is properly configured?

Exit privileged EXEC mode and press Enter.

A client packet is received by a server. The packet has a destination port number of 21. What service is the client requesting?

FTP

What are two features of ARP?

If a host is ready to send a packet to a local destination device and it has the IP address but not the MAC address of the destination, it generates an ARP broadcast, if a device receiving an ARP request has the destination IPv4 address, it responds with an ARP reply.

What mechanism is used by a router to prevent a received IPv4 packet from traveling endlessly on a network?

It checks the value of the TTL field and if it is 0, it discards the packet and sends a Destination Unreachable message to the source host.

What is an advantage to using a protocol that is defined by an open standard?

It encourages competition and promotes choices.

What service is provided by BOOTP

Legacy application that enables a diskless workstation to discover its own IP address and find a BOOTP server on the network.

What attribute of a NIC would place it at the data link layer of the OSI model?

MAC address

What is a benefit of using cloud computing in networking?

Network capabilities are extended without requiring investment in new infrastructure, personnel, or software.

Hardware threats

Physical damage to servers, routers, switches, cabling plant, and workstations

Maintenance threats

Poor handling of key electrical components (electrostatic discharge), lack of critical spare parts, poor cabling, and poor labeling

Which two functions are performed at the MAC sublayer of the OSI Data Link Layer to facilitate Ethernet communication?

Responsible for internal structure of Ethernet frame, implements trailer with frame check sequence for error detection.

What service is provided by POP3?

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

A network administrator needs to keep the user ID, password, and session contents private when establishing remote CLI connectivity with a switch to manage it. Which access method should be chosen?

SSH

What is the consequence of configuring a router with the ipv6 unicast-routing global configuration command?​

The IPv6 enabled router interfaces begin sending ICMPv6 Router Advertisement messages.

What will happen if the default gateway address is incorrectly configured on a host?

The host cannot communicate with hosts in other networks.

The global configuration command ip default-gateway 172.16.100.1 is applied to a switch. What is the effect of this command?

The switch can be remotely managed from a host on another network.

Which value, that is contained in an IPv4 header field, is decremented by each router that receives a packet?

Time-to-Live

Which type of security threat would be responsible if a spreadsheet add-on disables the local software firewall?

Trojan horse

What are the two most effective ways to defend against malware?

Update the operating system and other application software, install and update antivirus software.

What are three commonly followed standards for constructing and installing cabling?

cable lengths, pinouts, connector types

A group of Windows PCs in a new subnet has been added to an Ethernet network. When testing the connectivity, a technician finds that these PCs can access local network resources but not the Internet resources. To troubleshoot the problem, the technician wants to initially confirm the IP address and DNS configurations on the PCs, and also verify connectivity to the local router. Which three Windows CLI commands and utilities will provide the necessary information?

nslookup, ping, ipconfig

What are two characteristics shared by TCP and UDP?

port numbering and use of checksum

A disgruntled employee is using some free wireless networking tools to determine information about the enterprise wireless networks. This person is planning on using this information to hack the wireless network. What type of attack is this?

reconnaissance

Refer to the exhibit. If PC1 is sending a packet to PC2 and routing has been configured between the two routers, what will R1 do with the Ethernet frame header attached by PC1?

remove the Ethernet header and configure a new Layer 2 header before sending it out S0/0/0

Which information does the show startup-config command display?

the contents of the saved configuration file in the NVRAM

Users are reporting longer delays in authentication and in accessing network resources during certain time periods of the week. What kind of information should network engineers check to find out if this situation is part of a normal network behavior?

the network performance baseline

What is the purpose of the TCP sliding window?

to request that a source decrease the rate at which it transmits data

During the process of forwarding traffic, what will the router do immediately after matching the destination IP address to a network on a directly connected routing table entry?

switch the packet to the directly connected interface

A client packet is received by a server. The packet has a destination port number of 80. What service is the client requesting?

HTTP

A client packet is received by a server. The packet has a destination port number of 143. What service is the client requesting?

IMAP

A client is using SLAAC to obtain an IPv6 address for its interface. After an address has been generated and applied to the interface, what must the client do before it can begin to use this IPv6 address?

It must send an ICMPv6 Neighbor Solicitation message ensure that the address is not already in use on the network.

Two pings were issued from a host on a local network. The first ping was issued to the IP address of the default gateway of the host and it failed. The second ping was issued to the IP address of a host outside the local network and it was successful. What is a possible cause for the failed ping?

Security rules are applied to the default gateway device, preventing it from processing ping requests.

What are two problems that can be caused by a large number of ARP request and reply messages?

The ARP request is sent as a broadcast, and will flood the entire subnet, all ARP request messages must be processed by all nodes on the local network.

Which frame field is created by a source node and used by a destination node to ensure that a transmitted data signal has not been altered by interference, distortion, or signal loss?

frame check sequence field

What is a function of the data link layer?

provides for the exchange of frames over a common local media

An employee of a large corporation remotely logs into the company using the appropriate username and password. The employee is attending an important video conference with a customer concerning a large sale. It is important for the video quality to be excellent during the meeting. The employee is unaware that after a successful login, the connection to the company ISP failed. The secondary connection, however, activated within seconds. The disruption was not noticed by the employee or other employees. What three network characteristics are described in this scenario?

security, fault tolerance, quality of service