CCNA DC Networking Practice Test

Exam: 640-911

Question 1 / 10 - Mode : Demo

90:00

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

How is the root bridge involved in the STP topology? (Choose two)

A. It maintains the stability of the forwarding paths between all the switches for single VTP instance

B. It is selected on the basis of the highest MAC address

C. It is elected as the master bridge on the LAN and all path calculation through the network is based on it

D. It is the reference point that all switches use to establish the forwarding paths that avoid loops in the Layer 2 network

What are two primary characteristics of RIP? (Choose two)

A. Maximum allowable hop count is 15.

B. Routing updates are broadcast every 30 seconds by default.

C. The default administrative distance is 90 for internal routes.

D. The dead interval is four times the hello interval by default.

E. The hello interval on multiaccess networks is 10 seconds by default.

Which two protocols are categorized as link-state routing protocols? (Choose two)

A. EIGRP

B. IS-IS

C. RIP

D. BGP

E. OSPF

Which protocol is used to map IP addresses to MAC addresses on a network?

A. ARP

B. TCP

C. DHCP

D. NAT

E. UDP

What is the purposing of windowing? (Choose two)

A. It establishes a connection using a three-way handshake

B. It allows the sending computer to send out a number of packets without receiving acknowledgment of those packets

C. It involves distinguishing sessions from other sessions using port numbers

D. It helps maintain the speed and reliability of the connection

How does EUI-64 work?

A. Assigns an IPv4 address and then adds the MAC address

B. Uses the IPv4 address and adds additional 32 bits

C. Assigns an IPv6 address from DHCPv6

D. Uses the MAC address plus 16 bits to create an address

How does peer-to-peer communication work? (Choose two)

A. Each layer depends on the OSI layer above it to provide a service

B. The physical layer encodes the data link frame into a pattern of bits for transmission

C. The data link layer presents data to the network subsystem

D. The protocols at each layer exchange packets of information between peer layers

How are subnet masks calculated? (Choose two)

A. Subnetting provides the benefit of allowing more hosts per subnet

B. The formula used to calculate the number of subnets a given subnet mask would create is 2^s, where s equals the number of borrowed bits

C. When creating a custom subnet mask, the first and last subnet cannot be used

D. In order to create 21 subnets, you would need to borrow a minimum of 5 host bits

The OSI model breaks network communications into smaller, simpler parts. Which OSI model benefit is this a description of?

A. Reduced complexity

B. Simplifying teaching and learning

C. Accelerating evolution

D. Standardizing interfaces

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