Networking Exam 3-1

A switch tracks MAC addresses of directly-connected devices

How does a switch differ from a hub?

TCP/IP Functional Summary Layer 3

Internet Layer: responsible for addressing, routing, and packaging data packets.

Given an IP address 172.16.28.252 with a subnet mask of 255.255.240.0, what is the correct network address?

172.16.16.0

TFTP

A connectionless service that uses UDP to transfer files between systems

PAN

A home user is pairing a bluetooth gaming controller with the game console. Which of the following is implemented between the console and the controller?

data-link OSI layer

A network administrator cannot connect to a remote router by using SSH. Part of the show interfaces command is shown. Router# show interfaces Serial0/1/0 is up, line protocol is down At which OSI layer should the administrator begin troubleshooting?

Application

A network administrator is verifying the configuration of a newly installed host by establishing an FTP connection to a remote server. What is the highest layer of the protocol stack that the network administrator is using for this operation?

DNS

A protocol that converts human-readable names into Layer 3 addresses

FTP

A reliable, connection-oriented service that uses TCP to transmit files between systems

forward it out of all ports except the one that received it

A switch receives a frame on one of its ports. There is no entry in the MAC address table for the destination MAC address. What will the switch do with the frame?

Router# show running-config

An administrator is in the process of changing the configuration of a router. What command will allow the administrator to check the changes that have been made prior to saving the new configuration?

172.16.156.0/22

An end-device has been configured with the following IP address and netmask: 172.16.159.159/22. What is the subnet this end-device is part of?

OSI Functional Summary Layer 7

Application : Interfaces between network and application software. Also includes authentication services.

TCP/IP Functional Summary Layer 1

Application Layer: enables client application programs to access the other layers, and it defines the protocols that applications use to exchange data.

Type of UTP Cable for PC to PC Hub to Hub PC to Router Hub to Switch Switch to Switch Router to Router

Crossover

OSI Functional Summary Layer 2

Data link : Formats data into frames appropriate for transmission onto some physical medium. Defines rules for when the medium can be used. Defines means by which to recognize transmission errors.

OSI Functional Summary Layer 3

Network : Logical addressing, routing, and path determination.

TCP/IP Functional Summary Layer 4

Network Interface Layer: places packets on, and receives them from, the network medium, which can be any networking technology.

OSI Functional Summary Layer 1

Physical : Defines the electrical, optical, cabling, connectors, and procedural details required for transmitting bits, represented as some form of energy passing over a physical medium.

OSI Functional Summary Layer 6

Presentation : Defines the format and organization of data. Includes encryption.

Which router command will configure an interface with the IP address 10.10.80.1/19?

Router(config-if)# ip address 10.10.80.1 255.255.224.0

OSI Functional Summary Layer 5

Session : Establishes and maintains end-to-end bidirectional flows between endpoints. Includes managing transaction flows.

They allow connectivity to remote networks that are not in the routing table They keep routing tables small

Some routers have been configured with default routes. What are some of the advantages of using default routes?

Type of UTP Cable for PC to Switch Hub to Router PC to Hub

Straight-through

Packets that are destined for host 192.168.100.164 will be sent to 192.168.10.2

The command: ip route 192.168.100.160 255.255.255.224 192.168.10.2 was issued on a router. No routing protocols or other static routes are configured on the router. Which statement is true about this command?

One IP subnet with a mask of 255.255.254.0 Seven 48-port switches One router interface

The network manager has requested a 300-workstation expansion of the network. The workstations are to be installed in a single broadcast domain, but each workstation must have its own collision domain. The expansion is to be as cost-effective as possible while still meeting the requirements. Which three items will adequately fulfill the request?

Some routers have been configured with default routes. What are some of the advantages of using default routes? Choose two answers.

They allow connectivity to remote networks that are not in the routing table They keep routing tables small

OSI Functional Summary Layer 4

Transport : establishment and termination, flow control, error recovery, and segmentation of large data blocks into smaller parts for transmission.

TCP/IP Functional Summary Layer 2

Transport Layer: provides the application layer with communication and packet services.

DHCP

Used to assign IP addresses automatically and set parameters such as subnet mask and default gateway

allows remote management of the switch

What is the purpose of assigning an IP address to a switch?

In an Ethernet network, under what two scenarios can devices transmit? Choose two answers.

When they detect no other devices are sending. When the medium is idle.

OSI - Application, Presentation, Session TCP/IP - Application

Which Protocol Suite matches OSI Model to TCP/IP Model => HTTP, DNS, DHCP, FTP

OSI - Network TCP/IP - Internet

Which Protocol Suite matches OSI Model to TCP/IP Model => IPv4, IPv6, ICMPv4, ICMPv6

OSI - Data Link, Physical TCP/IP - Network Access

Which Protocol Suite matches OSI Model to TCP/IP Model => PPP, Frame Relay, Ethernet

OSI - Transport TCP/IP - Transport

Which Protocol Suite matches OSI Model to TCP/IP Model => TCP, UDP

Destination MAC address

Which address type does a switch use to make selective forwarding decisions?

Transport

Which layer of the OSI model controls the reliability of communications between network devices using flow control, sequencing and acknowledgments?

Option B (Hub)

Which network device functions only at Layer 1 of the OSI model?

UDP Port Number TCP Port Number

Which of the following header fields identify which TCP/IP application gets data received by the computer?

Collisions can happen, but the algorithm defines how the computers should notice a collision and how to recover.

Which of the following is true about the CSMA/CD algorithm?

SMTP

Which of the following protocols is used to send mail to another server on the Internet?

UDP

Which transport layer protocol provides best-effort delivery service with no acknowledgment receipt required?

Increases the number of collision domains Implements VLAN

Which two benefits are obtained by upgrading from hubs to Layer 2 switches?

Examine the Layer 3 headers of inbound packets and use that information to determine the next hops for the packets Update the Layer 2 headers of outbound packets with the MAC addresses of the next hops

Which two of these functions do routers perform on packets?

Router / Layer-3 Switch

Which two options will help to solve the problem of a network that is suffering a broadcast storm?

There are no collisions in full-duplex mode The host network card and the switch port must be capable of operating in full-duplex mode

Which two statements are true about the operation of a full-duplex Ethernet network?

In a CSMA/CD collision domain, stations must wait until the media is not in use before transmitting After a collision, all stations run a random backoff algorithm. When the backoff delay period has expired, all stations have equal priority to transmit data

Which two statements describe the operation of the CSMA/CD access method?

SNMP

a protocol used in network management systems for the monitoring of network-attached devices