CS6250 Exam 2 - Lesson 12 Quiz

flatter

As the Internet evolves, the topology of the ISPs has become ______, and the number of IXPs increases as the time progresses due to the services they offer and the lower costs for the ISPS.

increases

As the Internet evolves, the topology of the ISPs has become flatter, and the number of IXPs _____ as the time progresses due to the services they offer and the lower costs for the ISPS.

lower costs

As the Internet evolves, the topology of the ISPs has become flatter, and the number of IXPs increases as the time progresses due to the services they offer and the ______ for the ISPS.

cluster, server

For a CDN to deliver content to an Internet user, a _____ is mapped to a client first and then a _____ within that cluster is selected.

CDN

For a _____ to deliver content to an Internet user, a cluster is mapped to a client first and then a server within that cluster is selected.

unreliable

There are several factors that can make a CDN network ______, such as misconfigured routers, power outages, malicious attacks or natural disasters.

CDN network

There are several factors that can make a ______ unreliable, such as misconfigured routers, power outages, malicious attacks or natural disasters.

content delivery

When using CDN servers for ______, there is more overhead than when using the traditional approach.

overhead

When using CDN servers for content delivery, there is more _____ than when using the traditional approach.

previously queried

When using DNS caching, if a host A makes a request for a domain that was just ______ by another host the local DNS server will immediately answer the host with the IP address.

immediately answer

When using DNS caching, if a host A makes a request for a domain that was just previously queried by another host the local DNS server will ______ the host with the IP address.

DNS caching

When using _____, if a host A makes a request for a domain that was just previously queried by another host the local DNS server will immediately answer the host with the IP address.

IP Anycast

_____ assigns the same IP address to multiple servers in order to deliver content from CDNs by using the closest server to a client based on BGP path length.

multiple servers

IP Anycast assigns the same IP address to _____ in order to deliver content from CDNs by using the closest server to a client based on BGP path length.

BGP path length

IP Anycast assigns the same IP address to multiple servers in order to deliver content from CDNs by using the closest server to a client based on _____.

True

True or False: As the Internet evolves, the topology of the ISPs has become flatter, and the number of IXPs increases as the time progresses due to the services they offer and the lower costs for the ISPS.

False

True or False: By using consistent hashing for server selection, in the case of a server failure, the objects that the server was responsible for can be taken care of by a random server within the same ID space.

True

True or False: For a CDN to deliver content to an Internet user, a cluster is mapped to a client first and then a server within that cluster is selected.

False

True or False: HTTP redirection can only be used in order to share the load of content requests among servers.

True

True or False: IP Anycast assigns the same IP address to multiple servers in order to deliver content from CDNs by using the closest server to a client based on BGP path length.

False

True or False: One of the advantages of using CDNs is that the routing protocols they use take important aspects into consideration, such as congestion, latency, etc., in order to best deliver the content to the Internet users.

False

True or False: Picking the geographically closest cluster location for a user is always the best choice in terms of performance for content delivery.

False

True or False: The major drawback of the "Enter Deep" approach is that, if one server is lost, that geographic area will experience a higher delay and lower throughput.

True

True or False: There are several factors that can make a CDN network unreliable, such as misconfigured routers, power outages, malicious attacks or natural disasters.

True

True or False: When using CDN servers for content delivery, there is more overhead than when using the traditional approach.

NS

What is the type of the following resource record: (amazon.com, dns.amazon.com, ?, TTL)?