Lernkartei ITS Modul 02 1-9 (Seite 1 von 3)

Karten	105
Sprache	English
Kategorie	Informatik
Stufe	Andere
Erstellt / Aktualisiert	16.03.2016 / 07.07.2016
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What is a basic function of the Cisco Borderless Architecture distribution layer?

acting as a backbone

aggregating all the campus blocks

aggregating Layer 3 routing boundaries

providing access to end user devices

A network designer must provide a rationale to a customer for a design which will move an enterprise from a flat network topology to a hierarchical network topology. Which two features of the hierarchical design make it the better choice? (Choose two.)

lower bandwidth requirements

reduced cost for equipment and user training

easier to provide redundant links to ensure higher availability

less required equipment to provide the same performance levels

simpler deployment for additional switch equipment

What is a collapsed core in a network design?

a combination of the functionality of the access and distribution layers

a combination of the functionality of the distribution and core layers

a combination of the functionality of the access and core layers

a combination of the functionality of the access, distribution, and core layers

Which two previously independent technologies should a network administrator attempt to combine after choosing to upgrade to a converged network infrastructure? (Choose two.)

user data traffic

analog and VoIP phone traffic

scanners and printers

mobile cell phone traffic

electrical system

What is a definition of a two-tier LAN network design?

access and core layers collapsed into one tier, and the distribution layer on a separate tier

access and distribution layers collapsed into one tier, and the core layer on a separate tier

distribution and core layers collapsed into one tier, and the access layer on a separate tier

access, distribution, and core layers collapsed into one tier, with a separate backbone layer

A local law firm is redesigning the company network so that all 20 employees can be connected to a LAN and to the Internet. The law firm would prefer a low cost and easy solution for the project. What type of switch should be selected?

fixed configuration

modular configuration

stackable configuration

StackPower

StackWise

What are two advantages of modular switches over fixed-configuration switches? (Choose two.)

lower cost per switch

increased scalability

lower forwarding rates

need for fewer power outlets

availability of multiple ports for bandwidth aggregation

Refer to the exhibit. Consider that the main power has just been restored. PC3 issues a broadcast IPv4 DHCP request. To which port will SW1 forward this request?

to Fa0/1 only

to Fa0/1 and Fa0/2 only

to Fa0/1, Fa0/2, and Fa0/3 only

to Fa0/1, Fa0/2, Fa0/3, and Fa0/4

to Fa0/1, Fa0/2, and Fa0/4 only

What is one function of a Layer 2 switch?

forwards data based on logical addressing

duplicates the electrical signal of each frame to every port

learns the port assigned to a host by examining the destination MAC address

determines which interface is used to forward a frame based on the destination MAC address

Refer to the exhibit. How is a frame sent from PCA forwarded to PCC if the MAC address table on switch SW1 is empty?

SW1 floods the frame on all ports on the switch, excluding the interconnected port to switch SW2 and the port through which the frame entered the switch.

SW1 floods the frame on all ports on SW1, excluding the port through which the frame entered the switch.

SW1 forwards the frame directly to SW2. SW2 floods the frame to all ports connected to SW2, excluding the port through which the frame entered the switch.

SW1 drops the frame because it does not know the destination MAC address.

What two criteria are used by a Cisco LAN switch to decide how to forward Ethernet frames? (Choose two.)

path cost

egress port

ingress port

destination IP address

destination MAC address

Which network device can be used to eliminate collisions on an Ethernet network?

firewall

hub

router

switch

Which type of address does a switch use to build the MAC address table?

destination IP address

source IP address

destination MAC address

source MAC address

What are two reasons a network administrator would segment a network with a Layer 2 switch? (Choose two.)

to isolate ARP request messages from the rest of the network

to create fewer collision domains

to enhance user bandwidth

to create more broadcast domains

to eliminate virtual circuits

to isolate traffic between segments

Which statement describes the microsegmentation feature of a LAN switch?

Frame collisions are forwarded.

Each port forms a collision domain.

The switch will not forward broadcast frames.

All ports inside the switch form one collision domain.

What is the destination address in the header of a broadcast frame?

0.0.0.0

255.255.255.255

11-11-11-11-11-11

FF-FF-FF-FF-FF-FF

Refer to the exhibit. Fill in the blank.

How many collision domains are shown in the topology?

2

Fill in the blank.

A _________________ network is one that uses the same infrastructure to carry voice, data, and video signals.

converged

Match the functions to the corresponding layers. (Not all options are used.)

true

Match the borderless switched network guideline description to the principle. (Not all options are used.)

true

Match the forwarding characteristic to its type. (Not all options are used.)

true

Which interface is the default location that would contain the IP address used to manage a 24-port Ethernet switch?

VLAN 1

Fa0/0

Fa0/1

interface connected to the default gateway

VLAN 99

A production switch is reloaded and finishes with a Switch> prompt. What two facts can be determined? (Choose two.)

POST occurred normally.

The boot process was interrupted.

There is not enough RAM or flash on this router.

The switch did not locate the Cisco IOS in flash, so it defaulted to ROM.

A full version of the Cisco IOS was located and loaded.

Which two statements are true about using full-duplex Fast Ethernet? (Choose two.)

Performance is improved with bidirectional data flow.

Latency is reduced because the NIC processes frames faster.

Nodes operate in full-duplex with unidirectional data flow.

Performance is improved because the NIC is able to detect collisions.

Full-duplex Fast Ethernet offers 100 percent efficiency in both directions.

Which statement describes the port speed LED on the Cisco Catalyst 2960 switch?

If the LED is green, the port is operating at 100 Mb/s.

If the LED is off, the port is not operating.

If the LED is amber, the port is operating at 1000 Mb/s.

If the LED is blinking green, the port is operating at 10 Mb/s.

What is a function of the switch boot loader?

to speed up the boot process

to provide security for the vulnerable state when the switch is booting

to control how much RAM is available to the switch during the boot process

to provide an environment to operate in when the switch operating system cannot be found

In which situation would a technician use the show interfaces switch command?

to determine if remote access is enabled

when packets are being dropped from a particular directly attached host

when an end device can reach local devices, but not remote devices

to determine the MAC address of a directly attached network device on a particular interface

Refer to the exhibit. A network technician is troubleshooting connectivity issues in an Ethernet network with the command show interfaces fastEthernet 0/0. What conclusion can be drawn based on the partial output in the exhibit?

All hosts on this network communicate in full-duplex mode.

Some workstations might use an incorrect cabling type to connect to the network.

There are collisions in the network that cause frames to occur that are less than 64 bytes in length.

A malfunctioning NIC can cause frames to be transmitted that are longer than the allowed maximum length.

Refer to the exhibit. The network administrator wants to configure Switch1 to allow SSH connections and prohibit Telnet connections. How should the network administrator change the displayed configuration to satisfy the requirement?

Use SSH version 1.

Reconfigure the RSA key.

Configure SSH on a different line.

Modify the transport input command.

What is one difference between using Telnet or SSH to connect to a network device for management purposes?

Telnet uses UDP as the transport protocol whereas SSH uses TCP.

Telnet does not provide authentication whereas SSH provides authentication.

Telnet supports a host GUI whereas SSH only supports a host CLI.

Telnet sends a username and password in plain text, whereas SSH encrypts the username and password.

In which type of attack does a malicious node request all available IP addresses in the address pool of a DHCP server in order to prevent legitimate hosts from obtaining network access?â€‹

CAM table overflow

MAC address flooding

DHCP starvation

DHCP spoofing

Which method would mitigate a MAC address flooding attack?

increasing the size of the CAM table

configuring port security

using ACLs to filter broadcast traffic on the switchâ€‹

increasing the speed of switch ports

Which two features on a Cisco Catalyst switch can be used to mitigate DHCP starvation and DHCP spoofing attacks? (Choose two.)

port security

extended ACL

DHCP server failover

DHCP snooping

strong password on DHCP servers

Which two basic functions are performed by network security tools? (Choose two.)

revealing the type of information an attacker is able to gather from monitoring network traffic

educating employees about social engineering attacks

simulating attacks against the production network to determine any existing vulnerabilities

writing a security policy document for protecting networks

controlling physical access to user devices

An administrator wants to use a network security auditing tool on a switch to verify which ports are not protected against a MAC flooding attack. For the audit to be successful, what important factor must the administrator consider?

if the CAM table is empty before the audit is started

if all the switch ports are operational at the same speed

if the number of valid MAC addresses and spoofed MAC addresses is the same

the aging-out period of the MAC address table

Which action will bring an error-disabled switch port back to an operational state?

Remove and reconfigure port security on the interface.

Clear the MAC address table on the switch.

Issue the switchport mode access command on the interface.

Issue the shutdown and then no shutdown interface commands.

Refer to the exhibit. Port Fa0/2 has already been configured appropriately. The IP phone and PC work properly. Which switch configuration would be most appropriate for port Fa0/2 if the network administrator has the following goals?

SWA(config-if)# switchport port-security
SWA(config-if)# switchport port-security maximum 2
SWA(config-if)# switchport port-security mac-address sticky

Which two statements are true regarding switch port security? (Choose two.)

The three configurable violation modes all log violations via SNMP.

Dynamically learned secure MAC addresses are lost when the switch reboots.

If fewer than the maximum number of MAC addresses for a port are configured statically, dynamically learned addresses are added to CAM until the maximum number is reached.

After entering the sticky parameter, only MAC addresses subsequently learned are converted to secure MAC addresses.

The three configurable violation modes all require user intervention to re-enable ports.

A network administrator configures the port security feature on a switch. The security policy specifies that each access port should allow up to two MAC addresses. When the maximum number of MAC addresses is reached, a frame with the unknown source MAC address is dropped and a notification is sent to the syslog server. Which security violation mode should be configured for each access port?

restrict

protect

warning

shutdown

Refer to the exhibit. What can be determined about port security from the information that is shown?

The port has been shut down.

The port has two attached devices.

The port violation mode is the default for any port that has port security enabled.

The port has the maximum number of MAC addresses that is supported by a Layer 2 switch port which is configured for port security.

ITS Modul 02 1-9

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