CCNA DC Networking Practice Test

Exam: 640-911

Question 1 / 10 - Mode : Demo

90:00

The subnet 172.16.0.0/21 equals a subnet mask of 255.255.248.0.

Determine the block size of this subnet.

A. 32

B. 8

C. 128

D. 4

E. 16

F. 64

Which component is responsible for the interconnection of application sessions to the network layer?

A. TCP

B. CDP

C. LLDP

D. ARP

E. STP

What are the characteristics of port channel operation? (Choose two)

A. The Cisco Nexus Series switches support the bundling of up to 24 ports into a port channel

B. A port channel must be negotiated dynamically using LACP

C. When virtual device contexts are used, all the ports in a port channel must be in the same VDC

D. Port channels combine multiple physical links into single logical link

In a redundant topology scenario, where you have 10 VLANs, what benefits would MSTP have over Rapid PVST+? (Choose two)

A. MSTP reduces the load on the CPU

B. MSTP would only require five spanning tree instances where as Rapid PVST+ would require ten

C. MSTP is easier to configure and provides a greater level of redundancy than Rapid PVST+

D. MSTP would only require two spanning tree instances where as Rapid PVST+ would require ten

In the IPv6 address 2001:db8:3c4d:15::1a2f:1a2b, what is the first part of the global routing prefix?

A. 2001

B. 1a2f

C. db8

D. 1a2b

What should you consider when creating VLANs? (Choose two)

A. Cisco Nexus switches support up to 5000 VLANs

B. The default Ethernet VLAN is VLAN 1

C. Cisco Nexus switches have a factory default configuration in which various default VLANs are preconfigured to support various media and protocol types

D. VLANS 3968 – 5000 are reserved for system use

What are the characteristics of a VLAN? (Choose two)

A. It can share broadcasts in different VLANs

B. It can improve the overall performance of the network

C. It cannot span multiple switches

D. It provides segmentation and organizational flexibility

What are the characteristics of a trunk? (Choose two)

A. A trunk is a point-to-point link between a router and another trunking-capable device

B. Cisco supports 802.1Q for trunking

C. 802.1Q ports cannot be assigned to a trunk

D. You can configure an interface as a trunk port or an access port

The IEEE 802.3 standard divides the OSI data link layer into which two sublayers? (Choose two)

A. LLC

B. MAC

C. DSAP

D. FCS

E. CSMA/CD

What is stored in a routing table?

A. MAC addresses

B. Web site names

C. Host computer names

D. The routes for network resources

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