Network Access Q/A's

Question 1

What’s type of data is carried over a port trunk?

Answer 1

tagged VLAN data traffic

Question 2

What type of trunking protocol is 802.1Q?

Answer 2

VLAN trunking protocol

Question 3

What type of data is carried over a Native VLAN?

What type of data is managed over a Native VLAN?

Answer 3

untagged VLAN data traffic

device management

Question 4

What is the clock rate in a router used to control over it’s serial interface?

Answer 4

data transmission speed

Question 5

When changing the bandwidth on an interface what’s two things are impacted?

Answer 5

QOS and software policy management

Question 6

What is the default speed of serial interface?

Answer 6

1.544 Mbps

Question 7

What does an EtherChannel combine to create a single interface/channel for data traffic …?

Answer 7

multiple physical ports

Question 8

Where are VLAN trunks created from?

Answer 8

the sub-interface of an interface

Question 9

By ignoring hello messages, BPDU guard is to used to prevent?

Answer 9

switching loops

Question 10

Port Fast when enabled immediately puts?

When Port Fast, is enabled what is disabled?

When Port Fast is enabled what should also be enabled immediately and why?

Answer 10

ports into forwarding state

(STP) Spanning Tree Protocol

BPDU Guard to prevent switching loops.

Question 11

Telnet is what type of two way communication terminal?

Telnet transports data over a network encrypted or in-plain text?

Answer 11

text-orientated virtual terminal

In-plain text.

Question 12

What does SSH stand for?

SSH provides what type of communication and connection over a network?

Answer 12

Secure Shell

two way encrypted communication

Question 13

What does HTTP stands for?

HTTP is responsible for allowing access to what … over a public network?

Answer 13

Hyper Text Transport Protocol

remote server resources

Question 14

What does HTTPS stand for?

HTTPS is responsible for allowing access to what … over a public network?

Answer 14

Hyper Text Transport Secure Protocol

encrypted remote server resources

Question 15

Console ports on routers and switches are used for?

Answer 15

device management

Question 16

Dynamic ARP Inspection (DAI) is used to automatically…?

Answer 16

inspect and reject invalid or malicious ARP packets.

Question 17

What are the three states of port security?

Answer 17

Shutdown
Protect
Restrict

Question 18

When a port is put in the shutdown state of port security what happens?

Answer 18

port shuts down, goes into an err-disable state

Question 19

In the protect state of port security what happens?

Answer 19

unauthorized addresses drop with no logging

Question 20

In the restricted state of port security what happens?

Answer 20

unauthorized addresses drop - logging and violation counts

Question 21

Sticky MAC address in port security are assigned…?

Answer 21

dynamically

Question 22

The default behavior of port security with no additional configuration…?

Answer 22

only one MAC address is allowed at a time

Question 23

What is port security responsible for?

Answer 23

Securing ports from unauthorized access

Question 24

What is the recommended ratio and rule of thumb for Ether-channel from the access layer to distribution?

Answer 24

20 PC’s to 1

A single uplink of 1 Gbps for ever 20 PC’s on 1 Gbps NICs to the distribution layer.

Question 25

What is the recommended ratio and rule of thumb for Ether-channel from the core layer to distribution? (general)

Answer 25

Recommendation is 4:1

Question 26

Layer 2 Tunnel Protocol (L2TP) is responsible for supporting service delivery of?

Answer 26

Virtual Private Networks (VPN) by an ISP

Question 27

Link Layer Discovery Protocol (LLDP) is responsible for advertising device information to?

LLDP is similar to what other protocol?

Answer 27

directly connected neighbors

Cisco Discover Protocol (CDP)

Question 28

Broadcast address are used to send frames to …?

Answer 28

all devices over a network

Question 29

Circuit switching operates at what layer?

Circuit switching provides a physical path between what two things?

Circuit switching is commonly used to establish a?

What is an example of circuit switching?

Answer 29

Layer 1

source and destination

channel/circuit

(ex. POTS Plain Old Telephone System)

Question 30

Packet switching operates at what layer?

Packet switching divides data into what?

Packet switching is responsible for?

Answer 30

Layer 3

blocks of frames with a header and payload

grouping data to distribute and route over networks