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Download Basic Networking Interview Questions and Answers PDF
50 Common Interview Questions and Answers Page 8 of 25 9. Tell me about your worst boss. This is a tricky question. So answer it with a mix of honesty, diplomacy and positivity. Pick a real example (make sure it’s not about someone working in the company you want to join), but be discreet about the person’s identity. Focus on one aspect of their behavior, and explain exactly why this made Computer Networking Interview Q & A 1. Define Network? A network is a set of devices connected by physical media links. A network is recursively is a connection of two or more nodes by a physical link or two or more networks connected by one or more nodes. 2. What is a Link? At the lowest level, a network can consist of two or more computers 21/11/ · Download Free PDF books of CCNA Interview Questions, CCNA Practicals and CCNP Practical Workbooks. Also download Subnetting Questions and Exercises Practicals PDFs
Network interview questions and answers pdf free download
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Log In with Facebook Log In with Google Sign Up with Apple. Remember me on this computer. Enter the email address you signed up with and we'll email you a reset link. Need an account? Click here to sign up. Download Free PDF. Networking Interview Questions and Answers - sachin p. Aakash Neve. Download PDF Download Full PDF Package This paper. A short summary of this paper.
The book also includes scenario based questions with diagrams and detailed tutorials. It is ideal for candidates aspiring for networking job interview. Question 1 Network interview questions and answers pdf free download happens when a TCP based packet exits a NAT firewall When a TCP packet exits a NAT firewall, the source port and destination port number in the TCP header along with the source and destination IP address in the IP header is added to the Network address translation table.
After this operation is performed, the source IP address in the IP header is re-written with the IP address of the NAT firewall following which the packet exits the firewall. Question 2 What happens when a TCP based packet returns to a NAT firewall When a TCP packet which exited the NAT firewall returns, the firewall looks into the destination port in the TCP header.
It would then identify the appropriate entry in the NAT table which has the corresponding entry. After the packet is identified, the destination IP address in the IP packet which now contains the IP address of the NAT firewall would be re-written with the actual initiators IP address, following which the packet is sent to the intended recipient.
Question 3 Explain a practical scenario why split tunneling is used Assume a scenario where a user initiates a VPN tunnel using a remote access client.
Once the connection is established, all packets would be sent through the VPN tunnel which is created. This would also apply for internet bound packets. To avoid internet packets to be sent through the tunnel, split tunneling feature is used. When the feature is enabled, all internet packets would be sent through the adapter which is associated with the internet connection on the client and not through the VPN tunnel. Question 4 What is the difference between TCP 4 way handshake and WPA 4 way handshake TCP 4 way handshake is used for tearing down a TCP session between a client and a server.
Question 5 Which protocol would you block on a firewall for blocking tracert Tracert uses ICMP at the network layer. ICMP should be denied on a firewall to block tracert. The following questions are based with reference to the below diagram Cisco router is used Question 6 Is a default gateway required to be configured on PC1 to ping Question 7 How many route entry would be available on the routers routing table.
There would be two route entries, Question 8 It is required that the server should not be accessed by systems on the Identify two techniques which can be used. Configure an inbound ACL on the Configure an outbound ACL on the Question 9 The gateway of PC1 is Should it be configured on it for PC1 to be able to ping PC1 and the gateway are on the same network. To ping a gateway it need not be configured as gateways are required to reach systems on different networks.
Question 10 How many route entry would be available on the router, if the interface corresponding to The route entry corresponding to Question 11 Apart from interface configuration on the router, is any additional configuration required on the router for PC1 to access the When the interfaces are configured, the routing table of the router is populated with the appropriate entries which are When PC1 pings PC2, the packet is sent to the router, which would then look up its routing table and forward to the appropriate interface to PC2.
The key is combined with an IV Initialization vector which is 24 bits in size and randomly generated and is unique for every data frame which is encrypted. Question 13 How does a switch forward traffic from a trunk port to appropriate VLAN, network interview questions and answers pdf free download.
Trunk links are used for carrying multiple vlan traffic. Every packet which is sent over a trunk port would have the appropriate VLAN ID inserted in the frame. The switch would look into the VLAN ID and forward the packet to the appropriate VLAN based on this information. Refer the below diagram for the following questions Cisco router is used Question 14 PC1 PC2 and PC3 are connected to the internet via a NAT router which does port address translation.
The TCP header would contain the source port network interview questions and answers pdf free download, which is network interview questions and answers pdf free download by the operating system and would be unique. The NAT router, on receipt of the TCP header would maintain an entry in the NAT table which would contain the source port number and the source IP address of the actual system which has initiated the connection with a translated mapping which would contain the source port as the same or different number, based on the routers implementation, and the source IP address as the NAT routers IP address.
The translated packet is sent to the Web server. The packet would be looked into and based on the destination port number, the correct entry in the NAT table would be used and forwarded to the actual recipient Question 15 How does the NAT router differentiate two simultaneous connections which are initiated from PC1 to the web server. The two simultaneous connections from PC1 would be two distinct TCP connections, which would contain unique source port numbers for each connection.
Based on this information, the NAT router would differentiate the connection. Question 16 What would the source IP address in the IP header which is sent from PC1 be when it reaches the web server.
When PC1 initiates network interview questions and answers pdf free download packet to the web server, the NAT router intercepts and re-writes the source IP address in the IP header with the IP address of the router.
When the packet reaches the web server, the source IP address would contain the IP address of the router, network interview questions and answers pdf free download.
Question 17 What would the destination IP address in the IP header which is sent from the web server to PC1 when it reaches the router. The packet sent from PC1 to the web server would contain the source IP address as the routers IP address after NAT and the destination IP address as the servers IP address.
The server responds with the destination IP address as the routers IP address. When the packet reaches the router, the destination IP address in the header would be the routers IP address. Question 18 What would the destination IP address in the IP header which is sent from the web server to PC1 when it reaches PC1.
When the packet from the web server reaches the router, the NAT table is looked into and checked for the actual initiator of the request. The router would then re-write the destination IP address in the IP header with the initiators IP address which is the IP address of PC1. So when the packet reaches PC1, the destination IP address would be that of PC1. NAT and routing are two different concepts. NAT would not perform routing for the packet, which it has translated. The router should be setup for additional routing as to how to forward the packet.
A default route would ensure that all unknown packets are forwarded to the internet. Question 21 If PAT is configured on the router, network interview questions and answers pdf free download, would it also take care of the packets be forwarded automatically to the internet PAT does not perform routing services. A default route is required to be configured for forwarding packets to the internet. Question 22 Which flavor of NAT is configured on a Cisco router needs for sharing internet Port Address translation is a feature which is used for internet sharing.
The feature is used for sharing a single IP address with multiple internal IP addresses, a typical scenario encountered during internet sharing, where the public IP address configured on the router Internet IP address is shared among the internal LAN users for accessing internet.
Question 23 In the below topology, it is required that the server residing on the LAN should be accessible by users residing on the internet. How can the configuration be achieved. The router used is Cisco. Static NAT is a feature which is available on routers to map public ip addresses with lan private ip addresses. In the above scenario, the organization can purchase a public ip address and use static nat feature to map the private ip address of the server.
The option of connecting the server to the internet through the modem is also a viable network interview questions and answers pdf free download but not recommended due to lack of security in the design. The address, Question 25 Two PCs are connected to a switch. The IP address of PC1 is Can PC1 ping PC2. It can be observed that, PC1 belongs to the network address of As both reside on different networks, a router would be required for communication between PC1 and PC2.
So in the current topology, PC1 would not be able to ping PC2. Question 26 Can a PC be configured with an IP address The corresponding IP address for the above subnet mask would be the broadcast address for the network So it is not permitted to be used as an IP address to be configured on a host. The number of IP addresses in the network isout if which the addresses Excluding the addresses, IP addresses can be used. So, computers can be configured using the available IP addresses.
Question 28 Would ARP protocol work on a frame relay network. ARP protocol is used to find the mac-address corresponding to a known IP address. It uses layer 2 broadcast for the same.
Frame relay does not support broadcast traffic, network interview questions and answers pdf free download, which would make ARP not network interview questions and answers pdf free download on the network.
Question 29 An organization has a main office and 5 branch offices.
Top 50 �� Network Administrator Interview Questions and Answers
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22/5/ · In this list of Networking interview questions, we have covered all commonly asked basic and advanced interview questions on networking with detailed answers to help you clear the job interview. The below list covers + important interview questions for Networking for freshers candidates as well as Networking interview questions for blogger.comted Reading Time: 8 mins PDF File link for Networking Question and Answer for Interview will be made available on the request. Hope you have liked the above questions like us on Facebook for daily updates. Networking Interview PDF Download Basic Networking Interview Question Answer PDF Download 21/11/ · Download Free PDF books of CCNA Interview Questions, CCNA Practicals and CCNP Practical Workbooks. Also download Subnetting Questions and Exercises Practicals PDFs
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