Computer Networking > EXAM > The Bits and Bytes of Computer Networking. Week 4: Network Services Already Passed (All)
The Bits and Bytes of Computer Networking. Week 4: Network Services Already Passed
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What transport layer protocol does DNS normally use? ✔✔UDP; While DNS over TCP does exist, UDP is the most common protocol. A DNS TTL determines what? ✔✔How long a DNS entry is allowed to b... e cached; TTL stands for Time to Live and determines how long a DNS entry can be cached How many root servers are there? ✔✔13; There are 13 root servers. An A Record contains what? ✔✔IPv4 address; An A record contains an IPv4 address Select all that are true. ✔✔One domain name can point to one IP; This is a valid DNS setup One domain name can point to many IPs; this is a valid DNS setup. Many domain names can point to the same IP; This is a valid DNS setup. [Show More]
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