Networking MCQs questions with answers to prepare for exams, tests, and certifications. These questions are taken from a real written exam and some parts are taken from an interview. So you will find questions on CCNA, TCP/IP, Protocols, IP addressing issues, OSI model, and more. This MCQ will easily prepare anyone to pass their exam.
1. An authoritative server on a _________.
A domaine
B label
C zone
D None of the above
C
A DNS zone is an adjacent or contiguous portion over which an authoritative DNS server operates. A zone is a part of a namespace. It is not a domain. A domain is a branch of the DNS namespace. A DNS zone can contain one or more contiguous domains. A DNS server can have authority over multiple DNS zones. A non-contiguous namespace cannot be a DNS zone.
2. A _______ is a server whose zone consists of the entire tree structure.
A domain server
B root server
C zone server
D None of the above
[st_adsense]
B
A root server is a server whose zone consists of the entire tree. A root server usually does not store any domain information but delegates its authority to other servers.
3. A ________ server loads zone information from data files.
A secondary
B primary
C zone
D None of the above
B
Primary server: Stores a file on the zone for which it has authority. It is responsible for creating, maintaining and updating the zone file.
4. The ________ server loads all information from the primary server.
A primary
B secondary
C zone
D None of the above
B
A primary/secondary DNS server configuration is a master/slave configuration where the primary DNS server is the master and the secondary DNS server is the slave. The secondary server is created at a second DNS provider to ensure redundancy on the DNS network.
5. When the secondary downloads information from the primary, it is called a______ transfer.
A domaine
B zone
C label
D None of the above
B
A zone transfer is the process where a primary DNS server sends a DNS zone to a secondary DNS server.
Alternatively, you can request a zone transfer yourself via the command line. This is a method to display the entire zone file. This can be done with the dig command:
Zone transfers are automatically triggered when the zone’s serial number is incremented. The zone serial number increments when the zone receives an update.
Zone transfers can be full or incremental. Full zone transfers are called AXFR (Asynchronous Full Transfer) or (Authoritative Full Transfer), while incremental zone transfers are IXFR (incremental transfer).
With a full transfer, the entire zone file is copied from the secondary to the primary server. Obviously, this can use a lot of bandwidth if the zone is large.
An incremental field transfer means that only changed records (added, deleted or modified) are sent.
Modern DNS servers will prefer IXFR over AXFR. You can perform these operations manually from the secondary server to update the zone. The commands you need to perform depend on the type of DNS server you are running.
6. On the Internet, the domain name space (tree) is divided into _______ different sections:
A three
B two
C four
D five
[st_adsense]
A
On the Internet, the domain name space (tree) is divided into three different sections: generic domains, national domains are associated with a country. and the reverse domain (resolution of an IP address into a domain name with a special domain “in-addr.arpa” added at the end).
Generic domains
National domains
Reversed domain
7. The ________ domain section uses two-character country abbreviations.
A generic
B national
C reversed
D None of the above
B
The national domain section uses two-character country abbreviations e.g. .fr (France), .us (United States), .ma (Morocco), etc.
8. The _________ domain is used to associate an address with a domain name.
A generic
B national
C reversed
D None of the above
[st_adsense]
C
9. In ______ resolution, the resolver expects the server to provide the final answer.
A iterative
B recursive
C normal
D None of the above
B
Recursive resolution: the client (resolver) can request a recursive response from a name server. This means that the resolver expects the server to provide the final answer. If the server is authoritative on the domain, it checks its database and answers. If the server is not authoritative on the domain, it sends the request to another server (usually the primary server) and waits for the response. If the primary server is authoritative, it answers, otherwise it sends the request to another server. When the request is finally resolved, the response comes back until it finally reaches the requesting client.
10. In __________ resolution, the server returns the IP address of the server which it believes can resolve the request.
A iterative
B recursive
C normal
D None of the above
[st_adsense]
A
Iterative resolution: If the client does not request a recursive response, the mapping can be done iteratively. If the server is authoritative on the domain, it sends the response. If not, it returns (to the client) the IP address of the server it believes can resolve the request. The client is responsible for repeating the request on the second server. If the newly addressed server can solve the problem, it answers the request with the IP address. Otherwise, the IP address of a new server is returned to the client. Now the client has to repeat the request to the third server. This process is called iterative because the client repeats the same request to several servers.
MCQPractice competitive and technical Multiple Choice Questions and Answers (MCQs) with simple and logical explanations to prepare for tests and interviews.Read More