study questions

What is the decimal equivalent of the hex number 0x3F?

63

Which of the following are data link layer protocols? (Choose three)

802.11 Ethernet PPP

Which access method would be the most appropriate if you call your manager to tell him you cannot access your router in another city over the internet and he provides you with the information to access the router through a telephone connection?

Aux

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

CSMA/CA

Which two protocols are service discovery protocols? (Choose two.)

DNS DHCP

Which layer of the OSI model is responsible for specifying the encapsulation method used for specific types of media?

Data Link

Which part of an Ethernet Frame uses a pad to increase the frame field to at least 64 bytes?

Data field

Which protocol operates at the network access layer of the TCP/IP model?

Ethernet

Which three are components of message timing? (Choose three.)

Flow Control Access Method Timeout

Which step of the communication process is concerned with properly identifying the address of the sender and receiver?

Formatting

What PDU is received by the physical layer for encoding and transmission?

Frame

Which duplex communication method is used in WLANs?

Half duplex

Which of the following are protocols that provide feedback from the destination host to the source host regarding errors in packet delivery? (Choose two.)

ICMPv4 ICMPv6

Which standards organization oversees development of wireless LAN standards?

IEEE

Which three acronyms/initialisms represent standards organizations? (Choose three.)

IEEE IETF IANA

Which organization defines standards for the network access layer (i.e., the OSI physical and data link layers)?

IEEE IETF IANA Cisco

A device receives a data link frame with data and processes and removes the Ethernet information. What information would be the next to be processed by the receiving device?

IP at the internet layer

Which two statements are correct about IPv4 and IPv6 addresses? (Choose two.)

IPv4 addresses are 32 bits in length. IPv6 addresses are represented by hexadecimal numbers.

Which two engineering organizations define open standards and protocols that apply to the data link layer? (Choose two.)

Institute of Electrical and Electronics Engineers (IEEE) International Telecommunication Union (ITU)

Which statement is true about the running configuration file in a Cisco IOS device?

It affects the operation of the device immediately when modified.

Which function or operation is performed by the LLC sublayer?

It communicates with upper protocol layers.

Which two functions or operations are performed by the MAC sublayer? (Choose two.)

It is responsible for Media Access Control. It adds a header and trailer to form an OSI Layer 2 PDU.

What are two benefits of using a layered network model? (Choose two.)

It prevents technology in one layer from affecting other layers. It assists in protocol design.

What are two services performed by the data link layer of the OSI model? (Choose two.)

It provides media access control and performs error detection. It accepts Layer 3 packets and encapsulates them into frames.

Which data link sublayer controls the network interface through software drivers?

LLC

What are the two sublayers of the OSI model data link layer? (Choose two.)

LLC MAC

Which of the following statements are true regarding network layer and data link layer addresses? (Choose three.)

Network layer addresses are logical and data link addresses are expressed as 12 hexadecimal digits. Data link layer addresses are physical and network layer addresses are logical. Network layer addresses are either 32 or 128 bits in length.

Which two statements are true regarding the user EXEC mode? (Choose two.)

Only some aspects of the router configuration can be viewed. The device prompt for this mode ends with the ">" symbol.

Which part of an Ethernet Frame notifies the receiver to get ready for a new frame?

Preamble

What is the responsibility of the MAC sublayer?

Provides the method to get the frame on and off the media

Which memory location on a Cisco router or switch will lose all content when the device is restarted?

RAM

Which memory location on a Cisco router or switch stores the startup configuration file?

Ram

Which services are provided by the internet layer of the TCP/IP protocol suite? (Choose three.)

Routing Protocols Messaging Internet protocol

When designers follow accepted standards and protocols, which of the four basic characteristics of network architecture is achieved?

Scalability

Which access method would be the most appropriate in-band access to the IOS over a network connection?

Telnet/SSH

What kind of network would use point-to-point, hub and spoke, or mesh topologies?

WAN

Which functionality is provided by DHCP?

automatic assignment of an IP address to each host

What type of communication will send a message to all devices on a local area network?

broadcast

What is a function of the MAC sublayer? (Choose three.)

controls access to the media checks for errors in received bits uses CSMA/CD or CSMA/CA to support Ethernet technology

Which logical address is used for delivery of data to a remote network?

destination IP address

What is the order of the two addresses in the data link frame?

destination MAC, source MAC

Which lists the Layer 2 and Layer 3 address fields in the correct order?

destination NIC address, source NIC address, source IP address, destination IP address

What types of standards are developed by the Electronics Industries Alliance (EIA)?

electric wiring and connectors

Which type of communication will send a message to a group of host destinations simultaneously?

multicast

Which of the following fiber-optic cable types use light emitting diodes (LEDs) as a data light source transmitter?

multimode

What is the general term that is used to describe a piece of data at any layer of a networking model?

protocol data unit

BGP and OSPF are examples of which type of protocol?

routing

What is the PDU associated with the transport layer?

segment

What is indicated by the term throughput?

the measure of the bits transferred across the media over a given period of time

Why would a technician enter the command copy startup-config running-config?

to copy an existing configuration into RAM

Which is a function of the Logical Link Control (LLC) sublayer?

to identify which network layer protocol is being used

What is the purpose of the sequencing function in network communication?

to uniquely label transmitted segments of data for proper reassembly by the receiver