CCNA network questions

What basic two methods are used to perform physical bit synchronization?

Asynchronous ans Synchronous

Identify the well known port number for NTP

123 is the port number for NTP

Which approch to bandwidth usage consume all the available frequencies on a network medium to transmit data

Baseband

What is the range of well known TCP and UTP?

Below 1024

Which protocol can be used to retrieve email from a server

IMAP and POP3

TCP is an example of what kind transport protocol

Connection Oriented

Identify three email protocols

IMAP4 SMTP POP3

Which protocol is used by a host to find the mapping between and IP address and a domain name?

DNS (Domain Name Server) provides mapping infomation from IP address to domain names

Which of the osi layers is accociated with MAC addresses?

Data link

Which layer of the OSI model contains the MAC and LLC sublayer?

Data link layer

Which multiplex approach are used at layer 1

FDM and TDM

Which on of the following protocols is used when reliably unloading or downloading files from a remote host?

FTP. File transfer protocol is used to upload and download files from the internet.

when traffic is being TRANSMITTED, a packet is grouped into a?

Frame. when traffic is transmitted it is grouped into a frame

The OSI data link layer is responsible for the creation of?

Frames . Data link layer is responsible for creating frames

When traffic is being received, a bit coming off the physical media is a grouped into?

Frames. bits coming off the physical layer is grouped into frames

Which of the following devices passes data based on the MAC address?

Switch

What service is unavailable for network users if the network administrator decided to block port 80?

HTTP. ALL HTTP service will be blocked

What is the name of the voice (not VIoP) service that enables an organization the ability to eliminate there in house telephony switch?

Host PBX

What is the device that forward data packets to all connected ports

Hub

An engineer uses the ping utility to vary the connectivity of a remote device

ICMP is used to ping utility to send and echo request to a remote device.

Which protocol is used to retrieve email on TCP port 143?

IMAP

What is the term that is used to describe the multiple occurances of virtual servers that exist on a single physical server?

Instance is referred to multiple occurances of virtual servers that exist on a single physical server

Which layer of the TCP/IP model can be directly mapped to the osi network layer?

Internet

What are the four layers of the tcp/ip stake?

Internet Network interface Transport Application

Which of the available data link layer synchronization method requires the least amount of overhead?

Isochronous

What are the following data link sublayers responsible for flow control?

LLC is responsible for flow control and synchronization of frames

The signal that crosses a fiber optic of cable is a function of what OSI?

Layer 1 (physical layer)

Frams are accociated with what layer of the OSI model

Layer 2 data link layer

Route discovery an sections is a function of what osi layer

Layer 3. Network Layer

Segments are associated with what layer of the osi model

Layer 4 Transport Layer

Which of the following are sublayers to the data link layer

MAC and LLC are sublayer to Data link. Media Access control and Logical Link Control

What device is at the same OSI model layer as a bridge?

Multilayer switch an switch

A organization is setting up a new data center and requires a precise level of time synchronization; what port is required to be allowed through a firewall to contact a time source?

NTP (Network Time protocol utilizes UDP 123 to syncronize network clocks

Which of the following virtualization technologies are considered to be off site?

NaaS and SaaS (Network as a Service) and (Server as a Service) are considered to be off site.

What is the name of the service that is offered by a service provider that enable organization the ability to offload their data center?

NaaS. (Network as a Service)

What protocol is an example of a session layer protocol

NetBIOS. Network basic input output system protocol

A router is responsible for routing traffic at what OSI model

Network

Ip addressing reside at what layer of the OSI model?

Network layer

Which of the osi layers is associated with an IP address

Network layer

At which OSI layer does an AP oerate

Physical layer

which of the following ports will need to be open if a FTP server is being used?

Port 20 and port 21 is needed to established to connect to the server

What is the method that can be used to represent bits on a physical copper cable?

Presence or Absence Voltage and transition of one voltage from another

What layer if the OSI is responsible for formatting

Presentation Layer is responsible for formatting and encryption

A user needed to connect to their computer from a remote location, what protocol and port would be used or this, it the client is a Microsoft Windows?

RDP - TCP port 3389. Remote desktop protocol is used on Microsoft windows.

Name one of the following ports used for sending and receiving mail messages between servers?

SMTP (simple mail transport protocol) port 25 is used for email communication between servers

What is the protocol that support secure connection to remote host via terminal emulation software?

SSH

An application service provider offer which type of service

SaaS. Server as a Service

Which of the following can be used instead of telnet to connect to remote device while remaining secure?

Secure Shell (SSH) provides a layer of security that telnet does not. It encrypt the data while it is being transferred

when traffic is being RECEIVED, a packet is grouped into a?

Segment . when traffic is being received it is grouped into a segment

Which of the following protocols offer guaranteed delivery?

TCP (Transmission Control Protocol) is connection oriented protocol that guarantees delivery of data

which of the following are port numbers for domain name service (DNS)?

TCP 53 and UDP 53 and common used ports for DNS

Which of the following are considered transport protocol?

TCP and UDP are both transport protocols

When using SSH (secure shell) protocol is being used, which common protocol is used?

TCP port 22

which port are typically used by engineers to access te CLI of a device?

TCP port 22 and TCP port 23

What is the protocol used for accessing routers and other managed network devices?

TELNET is virtual protocol. It allows sessions to be open on a remote host and then enables command to be run on the device.

What type of connection is required between virtual server and physical ethernet switch to achieve the benefits delivered by a virtual switch?

TRUNK. The connection between the physical server running the virtual platform and the physical ethernet switch must b a TRUNK to support assigning virtual servers to different VLAN's

When loading new software to a device the UDP port 69 is typically used what protocol uses this port?

Trivial File protocol (TFTP) is typically used to upload software undated to devices.

Windowing is provided at what layer of the OSI reference model

Transport Layer

The processing of OSI model data link layer frames function of what device?

switch

Which part of the transport layer protocol is connectionless

UDP , User datagram protocol

Which of the following port is used for the SNMP protocol to work?

UDP 161 (user datagram protocol) is used for SNMP to work

Which of the following protocols does not guarantee delivery of traffic?

UDP does not guarantee delivery of traffic

When using DHCP service, which port is used

UPD port 67 is used to use DHCP

What is the name of the VoIP service that enables an organization the ability to eliminate their in house telephony switches?

Virtual PBX

What is the name of the virtualization technology that enables a user to access there computer from any location using almost any device?

Virtual desktop enables a user to access there computer from any location using almost any device

What us the name of the technology that enables a single server to run multiple operating systems that are each given their own independent processor, memory and storage access

Virtual server

Which of the following virtualization technologies are considered to be on site

Virtual server and Virtual desktop

What is the name of virtualization technology that allows a virtual server to be on its own broadcast domain?

Virtual switches

What is the name of virtualization technology that allows a virtual server to have layer 2 control?

Virtual switches

The ability to alter the number of segments that are sent before acknowledgment is referred to as?

Windowing

What is the function of NTP?

is used t communicate time synchronization information between systems

what is the best way to temporarily disable telnet access for external users?

port 23. telnet uses port 23 for communications, by blocking this telnet service will disable

To encrypt HTTP traffic, which port is used?

port 443 is used to encrypt